Updated on 2026/05/29

写真a

 
ISHI Daiki
 
Organization
School of Science and Engineering Research Associate
Contact information
The inquiry by e-mail is 《here》
External link

Degree

  • 博士（理学） ( 東京都立大学 )

  • 修士（理学） ( 首都大学東京 )

Education

  • 2023.3
     

    Tokyo Metropolitan University   doctor course   completed

  • 2019.3
     

    Tokyo Metropolitan University   master course   completed

  • 2017.3
     

    Tokyo Metropolitan University   graduated

Research History

  • 2026.4 - Now

    Chuo University

  • 2023.4 - 2026.3

    Japan Aerospace Exploration Agency

  • 2019.4 - 2022.9

    Japan Society for the Promotion of Science

Professional Memberships

  • 2023.7 - Now

    高エネルギー宇宙物理連絡会

  • 2020.12 - Now

    日本物理学会

  • 2019.5 - Now

    日本地球惑星科学連合

  • 2017.7 - Now

    地球電磁気・地球惑星圏学会

  • 2017.6 - Now

    応用物理学会

  • 2016.12 - Now

    日本天文学会

▼display all

Research Interests

  • 固体惑星

  • 宇宙プラズマ

  • 宇宙観測機器開発

  • 惑星大気

Research Areas

  • Natural Science / Astronomy

  • Natural Science / Space and planetary sciences

Papers

  • Estimates of magnetospheric solar wind charge exchange events detectable with GEO-X

    Daiki Ishi, Yuichiro Ezoe, Ralf Boden, Yoshizumi Miyoshi, Kumi Ishikawa, Hiroshi Nakajima, Ikuyuki Mitsuishi, Masaki Numazawa, Yuki K. Satoh

    Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray   282 - 282   2024.8

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.3017781

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  • Modeling of geocoronal solar wind charge exchange events detected with Suzaku

    Daiki Ishi, Kumi Ishikawa, Yoshizumi Miyoshi, Naoki Terada, Yuichiro Ezoe

    Publications of the Astronomical Society of Japan   75 ( 1 )   128 - 152   2022.12

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    A model of geocoronal solar wind charge exchange (SWCX) emission was built and compared to five Suzaku detections of bright geocoronal SWCX events. An exospheric neutral hydrogen distribution model, charge exchange cross-sections, solar wind ion data taken with the ACE and WIND satellites, and magnetic field models of the Earth’s magnetosphere are all combined in order to predict time-variable geocoronal SWCX emission depending on line-of-sight directions of the Suzaku satellite. The modeled average intensities of O vii emission lines were consistent with the observed ones within a factor of three in four out of the five cases except for an event in which a line-of-sight direction was toward the night side of the high-latitude magnetosheath and a major geomagnetic storm was observed. Those of O viii emission lines were underestimated by a factor of three or more in all five cases. On the other hand, the modeled O vii and O viii light curves reproduced the observed ones after being scaled by ratios between the observed and modeled average intensities. In particular, short-term variations due to line-of-sight directions traversing cusp regions during an orbital motion of the Suzaku satellite were reproduced. These results are discussed in the context of model uncertainties.

    DOI： 10.1093/pasj/psac095

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  • Enhanced X-ray reflectivity from Pt-coated silicon micropore optics prepared by plasma atomic layer deposition

    Daiki Ishi, Yuichiro Ezoe, Kumi Ishikawa, Masaki Numazawa, Aoto Fukushima, Ryota Otsubo, Hikaru Suzuki, Tatsuya Yuasa, Sae Sakuda, Tomoki Uchino, Maiko Fujitani, Kazuhisa Mitsuda, Mark J. Sowa

    Applied Physics Express   13 ( 8 )   087001 - 087001   2020.8

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    Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    DOI： 10.35848/1882-0786/aba7a5

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    Other Link： https://iopscience.iop.org/article/10.35848/1882-0786/aba7a5/pdf

  • Suzaku detection of enigmatic geocoronal solar wind charge exchange event associated with coronal mass ejection

    Daiki Ishi, Kumi Ishikawa, Masaki Numazawa, Yoshizumi Miyoshi, Naoki Terada, Kazuhisa Mitsuda, Takaya Ohashi, Yuichiro Ezoe

    Publications of the Astronomical Society of Japan   71 ( 1 )   2019.1

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    DOI： 10.1093/pasj/psy142

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  • High-spectral-resolution X-Ray Observations of the Evolved Supermassive Stellar Binary System η Carinae: Fe K α Band Profile Revealed with XRISM

    Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Michael F. Corcoran, Lia Corrales, Elisa Costantini, Renata Cumbee, Maria Diaz Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Dominique Eckert, Satoshi Eguchi, Teruaki Enoto, Yuichiro Ezoe, Adam Foster, Ryuichi Fujimoto, Yutaka Fujita, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi Gallo, Javier A. García, Emi Goto, Liyi Gu, Matteo Guainazzi, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Ann Hornschemeier, Yuto Ichinohe, Shun Inoue, Daiki Ishi, Manabu Ishida, Yukiko Ishihara, Kumi Ishikawa, Yoshitaka Ishisaki, Francisco Junqueira, Jelle Kaastra, Timothy Kallman, Yoshiaki Kanemaru, Erin Kara, Satoru Katsuda, Richard L. Kelley, Caroline A. Kilbourne, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice Leutenegger, Michael Loewenstein, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, François Mernier, Bert Vander Meulen, Eric D. Miller, Jon M. Miller, Ikuyuki Mitsuishi, Asca Miyamoto, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mori, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Hiroshi Nakajima, Kazuhiro Nakazawa, Jan-Uwe Ness, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Shoji Ogawa, Anna Ogorzałek, Takashi Okajima, Naomi Ota, Stephane Paltani, Robert Petre, Paul Plucinsky, Frederick S. Porter, Katja Pottschmidt, Kosuke Sato, Toshiki Sato, Makoto Sawada, Hiromi Seta, Megumi Shidatsu, Aurora Simionescu, Randall Smith, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Makoto Tashiro, Yukikatsu Terada, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Ayşegül Tümer, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Shutaro Ueda, Yoshihiro Ueda, Shinichiro Uno, Jacco Vink, Shin Watanabe, Brian J. Williams, Satoshi Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita, Irina Zhuravleva

    The Astrophysical Journal   1003 ( 2 )   156 - 156   2026.5

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    Publishing type：Research paper (scientific journal)   Publisher：American Astronomical Society  

    Abstract

    The supermassive binary system, η Carinae, is experiencing enormous wind-driven mass loss at a rate unparalleled in the rest of the Galaxy. Their wind–wind collision (WWC) continuously produces shock heated, X-ray-emitting plasmas. The XRISM X-ray observatory observed the system in 2023 and 2024 when the X-ray emission began to increase toward periastron passage in 2025. This paper reports unprecedentedly high-resolution X-ray spectra in the Fe K α band between 6.2 and 7.1 keV, obtained with the Resolve X-ray microcalorimeter. The hydrogen-like (Ly α ) and helium-like (He α ) lines reveal three velocity components. Two of them are broadened with maximum velocities of 2000–3000 km s −1 , likely originating from the postshock companion wind. The other is relatively narrow, with a Gaussian broadening of only ∼290 km s −1 in 1 σ , which may originate from the postshock companion wind at the WWC stagnation point or penetrating the primary wind. The Fe fluorescent lines exhibit a moderate blueshift and broadening with velocities at 100–200 km s −1 , consistent with the primary wind’s velocity field. The spectra also confirm a Compton shoulder of the He α line complex for the first time. Both fluorescing and scattering spectral profiles indicate that the binary system is seen from the companion side during these observations. The flux ratio of the Compton-scattering emission to the fluorescent line suggests substantial hydrogen depletion of the primary wind, expected from CNO-cycled hydrogen nuclear fusion gas.

    DOI： 10.3847/1538-4357/ae3a80

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    Other Link： https://iopscience.iop.org/article/10.3847/1538-4357/ae3a80/pdf

  • Refined Constraints on the Hard X-Ray Polarization of the Crab Pulsar and Nebula Derived from an Extended XL-Calibur Dataset

    Matthew G. Baring, Jacob Casey, Sohee Chun, Ephraim Gau, Tomohiro Hakamata, Kun Hu, Daiki Ishi, Fabian Kislat, Mózsi Kiss, Merlin Kole, Henric Krawczynski, Haruki Kuramoto, Lindsey Lisalda, Bingkun Liu, Yoshitomo Maeda, Hironori Matsumoto, Shravan Vengalil Menon, Takuya Miyazawa, Kaito Murakami, Takashi Okajima, Mark Pearce, Brian Rauch, Kentaro Shirahama, Sean Spooner, Hiromitsu Takahashi, Sayana Takatsuka, Yuusuke Uchida, Varun, Andrew Thomas West

    The Astrophysical Journal   1002 ( 2 )   222 - 222   2026.5

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    Publishing type：Research paper (scientific journal)   Publisher：American Astronomical Society  

    Abstract

    We present updated hard X-ray polarization measurements of the Crab pulsar and nebula obtained with the balloon-borne polarimeter XL-Calibur in the ∼19–64 keV energy range. During the flight, intermittent failure of the Global Positioning System (GPS) receiver resulted in poorly constrained timing for ∼38% of the Crab dataset. By implementing a new phase recovery method that reconstructs timing during extended GPS-off intervals, phase tag data are recovered for ∼95% of the GPS-off dataset, increasing the precision of the phase-resolved analysis. Phase information for the data is recovered by using the Crab pulsar, with its 33 ms period, as an external timing source. Using a Markov Chain Monte Carlo framework to jointly fit phase offsets and frequency derivatives, sufficient phase accuracy is achieved across multiple periods without GPS for a phase-resolved analysis. This enables inclusion of nearly the full dataset in the polarization study. The polarization degree of the nebular emission is found to be (27.7 ± 4.9)% at a polarization angle of 127 2 ± 5 1, confirming previous XL-Calibur results and remaining aligned with the Crab’s spin axis, consistent with synchrotron emission from the inner nebula. Phase-resolved measurements show that the off-pulse and bridge intervals exhibit a strong polarization, while the pulsar peaks, although weakly constrained, remain in agreement with the softer-energy trends of IXPE. These findings reinforce a scenario in which hard X-ray emission arises primarily in the nebular torus and wind regions. The successful recovery of precise phase tagging from GPS-off data demonstrates the capacity to use the pulsar as an external clock even in the case of sparsely populated data.

    DOI： 10.3847/1538-4357/ae5b67

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    Other Link： https://iopscience.iop.org/article/10.3847/1538-4357/ae5b67/pdf

  • Accurate determination of chemical abundances near a supermassive black hole

    Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Lia Corrales, Elisa Costantini, Renata Cumbee, María Díaz Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Dominique Eckert, Teruaki Enoto, Satoshi Eguchi, Yuichiro Ezoe, Adam Foster, Ryuichi Fujimoto, Yutaka Fujita, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi Gallo, Javier A. Garcia, Liyi Gu, Matteo Guainazzi, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Ann Hornschemeier, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Jelle Kaastra, Timothy Kallman, Erin Kara, Satoru Katsuda, Yoshiaki Kanemaru, Richard Kelley, Caroline Kilbourne, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice Leutenegger, Michael Loewenstein, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, François Mernier, Eric D. Miller, Jon M. Miller, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mori, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Hiroshi Nakajima, Kazuhiro Nakazawa, Jan-Uwe Ness, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Shoji Ogawa, Anna Ogorzalek, Takashi Okajima, Naomi Ota, Stephane Paltani, Robert Petre, Paul Plucinsky, Frederick Scott Porter, Katja Pottschmidt, Kosuke Sato, Toshiki Sato, Makoto Sawada, Hiromi Seta, Megumi Shidatsu, Aurora Simionescu, Randall Smith, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Makoto Tashiro, Yukikatsu Terada, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi G. Tsuru, Ayşegül Tümer, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Yoshihiro Ueda, Shinichiro Uno, Jacco Vink, Shin Watanabe, Brian J. Williams, Satoshi Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita, Irina Zhuravleva, Kanta Fujiwara, Takuma Izumi, Taiki Kawamuro, Keiichi Maeda, Yuya Nakatani, Frits Paerels, Ryosuke Uematsu, Bert Vander Meulen

    Nature Astronomy   2026.3

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1038/s41550-026-02817-6

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    Other Link： https://www.nature.com/articles/s41550-026-02817-6

  • Numerical simulation of light-element geochemistry of the lunar surface using a compact and lightweight XRF imaging spectrometer

    Airi Toida, Daiki Ishi, Yuichiro Ezoe, Masaki Numazawa, Kumi Ishikawa

    Earth, Planets and Space   78 ( 1 )   2026.3

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    Understanding the evolution of the Moon requires mapping the global distribution and abundance of major elements on the lunar surface. X-ray fluorescence exploration is a promising method for estimating the distribution of light elements. The lunar south pole has drawn increasing scientific and exploratory interest. The chemical composition of the polar region is crucial for evaluating potential landing sites and interpreting data from in situ exploration of the lunar south pole. However, X-ray fluorescence observations have not achieved a complete global map of the lunar elemental distribution. This is due to various factors, such as low solar flare activity periods and radiation damage to the detectors. In some case, the limited energy resolution of the detectors prevented adequate resolution of the spectra of light elements. Particularly in the polar regions, observing fluorescent X-rays has been difficult because solar X-rays are weakly incident. This paper proposes global fluorescence X-ray imaging observations using our novel ultra-compact and lightweight X-ray telescope. We conduct a numerical calculation to develop an emission model for lunar fluorescent X-rays under M1-class solar flare conditions. Next, we incorporate a response model that reflects the instrument’s quantum efficiency and field of view. Assuming a polar circular orbit and an annual occurrence of 300 M-class solar flare events, we evaluate the required mission duration for a signal-to-background ratio exceeding 10. The simulation results indicate that O, Fe, Mg, Al, and Si could be observed globally in two years. In this case, the spatial resolution is approximately 70 km × 70 km. Moreover, a spacecraft with 25 telescopes to 5 × 5 array could facilitate global observation of O, Mg, Al, Si, and Fe in a year and detect Na within 2 years. The spatial resolution is about 30 km × 30 km. This result suggests that this approach could assist in developing future global lunar elemental maps and evaluating the chemical abundance of these elements across the entire surface of the Moon.

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    DOI： 10.1186/s40623-025-02326-2

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    Other Link： https://link.springer.com/article/10.1186/s40623-025-02326-2

  • Construction and mechanical alignment method of wide-field X-ray monitor with lobster-eye optics onboard HiZ-GUNDAM

    Hatsune Goto, Isshin Nagataka, Daisuke Yonetoku, Daiki Ishi, Yoshitomo Maeda, Hsien-Chieh Shen, Ryuji Kondo, Akito Kutsumi, Hiroshi Tomida, Makoto Arimoto, Shutaro Ueda, Tatsuya Sawano, Keito Watanabe, Haruaki Niinuma, Takumi Togashi, Rinon Kageyama, Tatsuro Kanenaga, Tenshin Otsuka, Junpei Kuwabara, Motoko Serino, Yuta Yamamoto, Kanta Yagi, Kaita Nakahashi, Kenta Kanou, Satoshi Sugita, Yuya Nagase, Naoki Takase, Shunichi Nakatsubo, Shuichi Gunji, Akihiro Doi, Hideo Matsuhara, Toru Kaga

    Journal of Astronomical Telescopes, Instruments, and Systems   12 ( 01 )   2026.3

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    Publishing type：Research paper (scientific journal)   Publisher：SPIE-Intl Soc Optical Eng  

    DOI： 10.1117/1.jatis.12.1.014007

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  • A fast starburst wind consumes most of the energy from supernovae

    Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Lia Corrales, Elisa Costantini, Renata Cumbee, María Díaz Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Dominique Eckert, Satoshi Eguchi, Teruaki Enoto, Yuichiro Ezoe, Adam Foster, Ryuichi Fujimoto, Yutaka Fujita, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi Gallo, Javier A. García, Liyi Gu, Matteo Guainazzi, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Ann Hornschemeier, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Jelle Kaastra, Timothy Kallman, Erin Kara, Satoru Katsuda, Yoshiaki Kanemaru, Richard Kelley, Caroline Kilbourne, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice Leutenegger, Michael Loewenstein, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, François Mernier, Eric D. Miller, Jon M. Miller, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mori, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Hiroshi Nakajima, Kazuhiro Nakazawa, Jan-Uwe Ness, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Shoji Ogawa, Anna Ogorzalek, Takashi Okajima, Naomi Ota, Stephane Paltani, Robert Petre, Paul Plucinsky, Frederick S. Porter, Katja Pottschmidt, Kosuke Sato, Toshiki Sato, Makoto Sawada, Hiromi Seta, Megumi Shidatsu, Aurora Simionescu, Randall Smith, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Makoto Tashiro, Yukikatsu Terada, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Ayşegül Tümer, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Yoshihiro Ueda, Shinichiro Uno, Jacco Vink, Shin Watanabe, Brian J. Williams, Satoshi Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita, Irina Zhuravleva, Kazuki Ampuku, Erin Boettcher, Skylar Grayson, Gabriel Grell, Peter Kosec, Seiya Sasamata, Evan Scannapieco

    Nature   651 ( 8107 )   909 - 913   2026.3

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1038/s41586-026-10231-1

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    Other Link： https://www.nature.com/articles/s41586-026-10231-1

  • Performance of the XL-Calibur hard X-ray telescope before and after the 2022 stratospheric flight

    Haruki Kuramoto, Hironori Matsumoto, Hiromitsu Takahashi, Yoshitomo Maeda, Takuya Miyazawa, Kazunori Ishibashi, Hisamitsu Awaki, Jacob Casey, Ephraim Gau, Kazuho Goya, Tomohiro Hakamata, Masato Hoshino, Daiki Ishi, Manabu Ishida, Fabian Kislat, Henric Krawczynski, Lindsey Lisalda, Shravan Vengalil Menon, Asca Miyamoto, Aiko Miyamoto, Kaito Murakami, Azuki Nagao, Sayana Takatsuka, Kentaro Shirahama, Sean Spooner, Mai Takeo, Yuusuke Uchida, Kentaro Uesugi, Masato Yokota, Marina Yoshimoto

    Journal of Astronomical Telescopes, Instruments, and Systems   12 ( 01 )   2026.3

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    Publishing type：Research paper (scientific journal)   Publisher：SPIE-Intl Soc Optical Eng  

    DOI： 10.1117/1.jatis.12.1.014006

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  • A XRISM/Resolve View of the Dynamics in the Hot Gaseous Atmosphere of M87

    Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Lia Corrales, Elisa Costantini, Renata Cumbee, Maria Diaz Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Dominique Eckert, Satoshi Eguchi, Teruaki Enoto, Yuichiro Ezoe, Adam Foster, Ryuichi Fujimoto, Yutaka Fujita, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi Gallo, Javier A. García, Liyi Gu, Matteo Guainazzi, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Ann Hornschemeier, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Jelle Kaastra, Timothy Kallman, Erin Kara, Satoru Katsuda, Yoshiaki Kanemaru, Richard Kelley, Caroline Kilbourne, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice Leutenegger, Michael Loewenstein, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, François Mernier, Eric D. Miller, Jon M. Miller, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mori, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Hiroshi Nakajima, Kazuhiro Nakazawa, Jan-Uwe Ness, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Shoji Ogawa, Anna Ogorzałek, Takashi Okajima, Naomi Ota, Stephane Paltani, Robert Petre, Paul Plucinsky, Frederick S. Porter, Katja Pottschmidt, Kosuke Sato, Toshiki Sato, Makoto Sawada, Hiromi Seta, Megumi Shidatsu, Aurora Simionescu, Randall Smith, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Makoto Tashiro, Yukikatsu Terada, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Ayşegül Tümer, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Shutaro Ueda, Yoshihiro Ueda, Shinichiro Uno, Jacco Vink, Shin Watanabe, Brian J. Williams, Satoshi Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita, Irina Zhuravleva, Matthew Charbonneau, Neo Dizdar, Masashi Fujita, Daisuke Ito, Jessica Martin, Hannah McCall, Helen Russell, John ZuHone

    The Astrophysical Journal   998 ( 2 )   210 - 210   2026.2

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    Publishing type：Research paper (scientific journal)   Publisher：American Astronomical Society  

    Abstract

    The XRISM/Resolve microcalorimeter directly measured the gas velocities in the core of the Virgo Cluster, the closest example of active galactic nucleus (AGN) feedback in a cluster. This proximity allows us to resolve the kinematic impact of feedback on scales down to 5 kpc. Our spectral analysis reveals a high velocity dispersion of km s −1 near the AGN, which steeply declines to ∼60 km s −1 between 5 and 25 kpc in the northwest direction. The observed line-of-sight bulk velocity in all regions is broadly consistent with the central galaxy, M87, with a mild trend toward blueshifted motions at larger radii. Systematic uncertainties have been carefully assessed and do not affect the measurements. The central velocities, if attributed entirely to isotropic turbulence, correspond to a transonic intracluster medium at sub-6 kpc scales with 3D Mach number and a nonthermal pressure fraction of . Simple models of weak shocks and sound waves and calculations assuming isotropic turbulence both support the hypothesis that the velocity field reflects a mix of shock-driven expansion and turbulence. Compared to other clusters observed by XRISM to date, M87’s central region stands out as the most kinematically disturbed, exhibiting both the highest velocity dispersion and the largest 3D Mach number, concentrated at the smallest physical scales.

    DOI： 10.3847/1538-4357/ae2c5c

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    Other Link： https://iopscience.iop.org/article/10.3847/1538-4357/ae2c5c/pdf

  • Disentangling multiple gas kinematic drivers in the Perseus galaxy cluster

    Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Lia Corrales, Elisa Costantini, Renata Cumbee, María Díaz Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Dominique Eckert, Satoshi Eguchi, Teruaki Enoto, Yuichiro Ezoe, Adam Foster, Ryuichi Fujimoto, Yutaka Fujita, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi Gallo, Javier A. García, Liyi Gu, Matteo Guainazzi, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Ann Hornschemeier, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Jelle Kaastra, Timothy Kallman, Erin Kara, Satoru Katsuda, Yoshiaki Kanemaru, Richard Kelley, Caroline Kilbourne, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice Leutenegger, Michael Loewenstein, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, François Mernier, Eric D. Miller, Jon M. Miller, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mori, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Hiroshi Nakajima, Kazuhiro Nakazawa, Jan-Uwe Ness, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Shoji Ogawa, Anna Ogorzalek, Takashi Okajima, Naomi Ota, Stephane Paltani, Robert Petre, Paul Plucinsky, Frederick S. Porter, Katja Pottschmidt, Kosuke Sato, Toshiki Sato, Makoto Sawada, Hiromi Seta, Megumi Shidatsu, Aurora Simionescu, Randall Smith, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Makoto Tashiro, Yukikatsu Terada, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi G. Tsuru, Ayşegül Tümer, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Yoshihiro Ueda, Shinichiro Uno, Jacco Vink, Shin Watanabe, Brian J. Williams, Satoshi Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita, Ian Drury, Julie Hlavacek-Larrondo, Julian Meunier, Kostas Migkas, Lior Shefler, Phillip C. Stancil, Nhut Truong, Shutaro Ueda, Benjamin Vigneron, John ZuHone, Congyao Zhang, Annie Heinrich, Irina Zhuravleva, Elena Bellomi

    Nature   2026.1

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1038/s41586-025-10017-x

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  • Chlorine and potassium enrichment in the Cassiopeia A supernova remnant

    Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Lia Corrales, Elisa Costantini, Renata Cumbee, Maria Diaz-Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan Eckart, Dominique Eckert, Teruaki Enoto, Satoshi Eguchi, Yuichiro Ezoe, Adam Foster, Ryuichi Fujimoto, Yutaka Fujita, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi Gallo, Javier A. Garcia, Liyi Gu, Matteo Guainazzi, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Ann Hornschemeier, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Jelle Kaastra, Timothy Kallman, Erin Kara, Satoru Katsuda, Yoshiaki Kanemaru, Richard Kelley, Caroline Kilbourne, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice Leutenegger, Michael Loewenstein, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, François Mernier, Eric D. Miller, Jon M. Miller, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mori, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Hiroshi Nakajima, Kazuhiro Nakazawa, Jan-Uwe Ness, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Shoji Ogawa, Anna Ogorzalek, Takashi Okajima, Naomi Ota, Stephane Paltani, Robert Petre, Paul Plucinsky, Frederick Scott Porter, Katja Pottschmidt, Kosuke Sato, Toshiki Sato, Makoto Sawada, Hiromi Seta, Megumi Shidatsu, Aurora Simionescu, Randall Smith, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Makoto Tashiro, Yukikatsu Terada, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi G. Tsuru, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Yoshihiro Ueda, Shinichiro Uno, Jacco Vink, Shin Watanabe, Brian J. Williams, Satoshi Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita, Irina Zhuravleva, Shin-ichiro Fujimoto, Kai Matsunaga, Manan Agarwal

    Nature Astronomy   2025.12

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1038/s41550-025-02714-4

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    Other Link： https://www.nature.com/articles/s41550-025-02714-4

  • XL-Calibur Polarimetry of Cyg X-1 Further Constrains the Origin of Its Hard-state X-Ray Emission

    Hisamitsu Awaki, Matthew G. Baring, Richard Bose, Jacob Casey, Sohee Chun, Adrika Dasgupta, Pavel Galchenko, Ephraim Gau, Kazuho Goya, Tomohiro Hakamata, Takayuki Hayashi, Scott Heatwole, Kun Hu, Daiki Ishi, Manabu Ishida, Fabian Kislat, Mózsi Kiss, Kassi Klepper, Henric Krawczynski, Haruki Kuramoto, Lindsey Lisalda, Yoshitomo Maeda, Hironori Matsumoto, Shravan Vengalil Menon, Aiko Miyamoto, Asca Miyamoto, Kaito Murakami, Takashi Okajima, Mark Pearce, Brian Rauch, Nicole Rodriguez Cavero, Kentaro Shirahama, Sean Spooner, Hiromitsu Takahashi, Keisuke Tamura, Yuusuke Uchida, Kasun Wimalasena, Masato Yokota, Marina Yoshimoto

    The Astrophysical Journal   994 ( 1 )   37 - 37   2025.11

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    Publishing type：Research paper (scientific journal)   Publisher：American Astronomical Society  

    Abstract

    The balloon-borne hard X-ray polarimetry mission XL-Calibur observed the black hole X-ray binary (BHXRB) Cygnus X-1 (Cyg X-1) during its nearly 6 day long-duration balloon flight from Sweden to Canada in 2024 July. The XL-Calibur observations allowed us to derive the most precise constraints to date of the polarization degree (PD) and polarization angle (PA) of the hard X-ray emission from a BHXRB. XL-Calibur observed Cyg X-1 in the hard state and measured a ∼19–64 keV PD of ( )% (equivalent to an upper limit, at the 99% level, of 11.1%) at a PA of −28° ± 17°, with an 8.7% chance probability of detecting larger PDs than the one observed, given an unpolarized signal. The XL-Calibur results are thus comparable to the 2–8 keV PD and PA found by Imaging X-ray Polarimetry Explorer (IXPE), with a similar agreement between the hard X-ray PA and the radio jet direction. We also discuss the implications of our polarization measurements in the context of models describing the origin of the broadband X-ray and γ -ray emission, to which XL-Calibur provides independent constraints on any proposed emission modeling.

    DOI： 10.3847/1538-4357/ae0f1d

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    Other Link： https://iopscience.iop.org/article/10.3847/1538-4357/ae0f1d/pdf

  • Resolve instrument onboard the X-Ray Imaging and Spectroscopy Mission

    Richard L. Kelley, Yoshitaka Ishisaki, Elisa Costantini, Hisamitsu Awaki, Jesus C. Balleza, Kim R. Barnstable, Thomas G. Bialas, Rozenn Boissay-Malaquin, Gregory V. Brown, Edgar R. Canavan, Timothy M. Carnahan, Meng P. Chiao, Brian J. Comber, Renata S. Cumbee, Jan-Willem den Herder, Johannes Dercksen, Cor P. de Vries, Michael J. DiPirro, Megan E. Eckart, Yuichiro Ezoe, Carlo Ferrigno, Ryuichi Fujimoto, Nathalie Gorter, Steven M. Graham, Martin Grim, Leslie S. Hartz, Ryota Hayakawa, Takayuki Hayashi, Natalie Hell, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Bryan L. James, Yoshiaki Kanemaru, Steven J. Kenyon, Caroline A. Kilbourne, Mark O. Kimball, Shunji Kitamoto, Maurice A. Leutenegger, Yoshitomo Maeda, Dan McCammon, Brian J. McLaughlin, Joseph J. Miko, Erik van der Meer, Misaki Mizumoto, Hirofumi Noda, Takashi Okajima, Atsushi Okamoto, Stephane Paltani, Frederick S. Porter, Lillian S. Reichenthal, Kosuke Sato, Toshiki Sato, Yoichi Sato, Makoto Sawada, Keisuke Shinozaki, Russell Shipman, Peter J. Shirron, Gary A. Sneiderman, Yang Soong, Richard Szymkiewicz, Andrew E. Szymkowiak, Yoh Takei, Mai Takeo, Keisuke Tamura, Masahiro Tsujimoto, Yuusuke Uchida, Stephen Wasserzug, Michael C. Witthoeft, Rob Wolfs, Shinya Yamada, Noriko Y. Yamasaki, Susumu Yasuda

    Journal of Astronomical Telescopes, Instruments, and Systems   11 ( 04 )   2025.11

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    Publishing type：Research paper (scientific journal)   Publisher：SPIE-Intl Soc Optical Eng  

    DOI： 10.1117/1.jatis.11.4.042026

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  • Comparing XRISM Cluster Velocity Dispersions with Predictions from Cosmological Simulations: Are Feedback Models Too Ejective?

    Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Lia Corrales, Elisa Costantini, Renata Cumbee, Maria Diaz Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Dominique Eckert, Satoshi Eguchi, Teruaki Enoto, Yuichiro Ezoe, Adam Foster, Ryuichi Fujimoto, Yutaka Fujita, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi Gallo, Javier A. García, Liyi Gu, Matteo Guainazzi, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Ann Hornschemeier, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Jelle Kaastra, Timothy Kallman, Erin Kara, Satoru Katsuda, Yoshiaki Kanemaru, Richard Kelley, Caroline Kilbourne, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice Leutenegger, Michael Loewenstein, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, François Mernier, Eric D. Miller, Jon M. Miller, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mori, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Hiroshi Nakajima, Kazuhiro Nakazawa, Jan-Uwe Ness, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Shoji Ogawa, Anna Ogorzałek, Takashi Okajima, Naomi Ota, Stephane Paltani, Robert Petre, Paul Plucinsky, Frederick S. Porter, Katja Pottschmidt, Kosuke Sato, Toshiki Sato, Makoto Sawada, Hiromi Seta, Megumi Shidatsu, Aurora Simionescu, Randall Smith, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Makoto Tashiro, Yukikatsu Terada, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Ayşegül Tümer, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Shutaro Ueda, Yoshihiro Ueda, Shinichiro Uno, Jacco Vink, Shin Watanabe, Brian J. Williams, Satoshi Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita, Irina Zhuravleva, Weiguang Cui, Stefano Ettori, Skylar Grayson, Annie Heinrich, Hannah McCall, Dylan Nelson, Nobuhiro Okabe, Yuki Omiya, Arnab Sarkar, Evan Scannapieco, Ming Sun, Keita Tanaka, Nhut Truong, Daniel R. Wik, Congyao Zhang, John ZuHone

    The Astrophysical Journal Letters   993 ( 1 )   L11 - L11   2025.10

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    Publishing type：Research paper (scientific journal)   Publisher：American Astronomical Society  

    Abstract

    The dynamics of the intracluster medium (ICM), the hot plasma that fills galaxy clusters, are shaped by gravity-driven cluster mergers and feedback from supermassive black holes (SMBHs) in the cluster cores. XRISM measurements of ICM velocities in several clusters offer insights into these processes. We compare XRISM measurements for nine galaxy clusters (Virgo, Perseus, Centaurus, Hydra-A, PKS 0745–19, A2029, Coma, A2319, and Ophiuchus) with predictions from three state-of-the-art cosmological simulation suites, TNG-Cluster, the Three Hundred Project GADGET-X, and GIZMO-SIMBA, that employ different models of feedback. In cool cores, XRISM reveals systematically lower velocity dispersions than the simulations predict, with all 10 measurements below the median simulated values by a factor of 1.5–1.7 on average and all falling within the bottom 10% of the predicted distributions. The observed kinetic-to-total pressure ratio is also lower, with a median value of 2.2%, compared to the predicted 5.0%–6.5% for the three simulations. Outside the cool cores and in non-cool-core (NCC) clusters, simulations show better agreement with XRISM measurements, except for the outskirts of the relaxed, cool-core cluster A2029, which exhibits an exceptionally low kinetic pressure support (<1%), with none of the simulated systems in either of the three suites reaching such low levels. The NCC Coma and A2319 exhibit dispersions at the lower end but within the simulated spread. Our comparison suggests that the three numerical models may overestimate the kinetic effects of SMBH feedback in cluster cores. Additional XRISM observations of NCC clusters will clarify if there is a systematic tension in the gravity-dominated regime as well.

    DOI： 10.3847/2041-8213/ae100c

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    Other Link： https://iopscience.iop.org/article/10.3847/2041-8213/ae100c/pdf

  • Delving into the depths of NGC 3783 with XRISM II. Cross-calibration of X-ray instruments used in the large, multi-mission observational campaign

    Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Lia Corrales, Elisa Costantini, Renata Cumbee, María Díaz Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Dominique Eckert, Satoshi Eguchi, Teruaki Enoto, Yuichiro Ezoe, Adam Foster, Ryuichi Fujimoto, Yutaka Fujita, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi Gallo, Javier A. García, Liyi Gu, Matteo Guainazzi, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Ann Hornschemeier, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Jelle Kaastra, Timothy Kallman, Yoshiaki Kanemaru, Erin Kara, Satoru Katsuda, Richard Kelley, Caroline Kilbourne, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice Leutenegger, Michael Loewenstein, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, François Mernier, Eric D. Miller, Jon M. Miller, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mori, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Hiroshi Nakajima, Kazuhiro Nakazawa, Jan-Uwe Ness, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Shoji Ogawa, Anna Ogorzalek, Takashi Okajima, Naomi Ota, Stephane Paltani, Robert Petre, Paul Plucinsky, Frederick S. Porter, Katja Pottschmidt, Kosuke Sato, Toshiki Sato, Makoto Sawada, Hiromi Seta, Megumi Shidatsu, Aurora Simionescu, Randall Smith, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Makoto Tashiro, Yukikatsu Terada, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Ayşegül Tümer, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Yoshihiro Ueda, Shinichiro Uno, Jacco Vink, Shin Watanabe, Brian J. Williams, Satoshi Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita, Irina Zhuravleva, Camille Diez, Keigo Fukumura, Chen Li, Missagh Mehdipour, Christos Panagiotou, Matilde Signorini, Keqin Zhao

    Astronomy & Astrophysics   702   A147 - A147   2025.10

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    Publishing type：Research paper (scientific journal)   Publisher：EDP Sciences  

    Context. Accurate X-ray spectroscopic measurements are fundamental for deriving basic physical parameters of the most abundant baryon components in the Universe. The plethora of X-ray observatories currently operational enables a panchromatic view of the high-energy emission of celestial sources. However, uncertainties in the energy-dependent calibration of the instrument transfer functions (e.g. the effective area, energy redistribution, or gain) can limit - and historically, did limit - the accuracy of X-ray spectroscopic measurements.

    Aims. We revised the status of the cross-calibration among the scientific payload on board four operation missions: Chandra, NuSTAR, XMM-Newton, and the recently launched XRISM. XRISM carries the micro-calorimeter Resolve, which yields the best energy resolution at energies ≥2 keV. For this purpose, we used the data from a 10-day-long observational campaign targeting the nearby active galactic nucleus NGC 3783, carried out in July 2024.

    Methods. We present a novel model-independent method for assessing the cross-calibration status that is based on a multi-node spline of the spectra with the highest-resolving power (XRISM/Resolve in our campaign). We also estimated the impact of the intrinsic variability of NGC 3783 on the cross-calibration status due to the different time coverages of participating observatories and performed an empirical reassessment of the Resolve throughput at low energies.

    Results. Based on this analysis, we derived a set of energy-dependent correction factors of the observed responses, enabling a statistically robust analysis of the whole spectral dataset. They will be employed in subsequent papers describing the astrophysical results of the campaign.

    DOI： 10.1051/0004-6361/202556000

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  • XRISM observations of solar flare X-ray emission reflected in the Earth’s atmosphere

    Hiromasa Suzuki, Jun Kurashima, Satoru Katsuda, Koji Mori, Shun Inoue, Daiki Ishi, Eugene M Churazov, Ildar Khabibullin, Rashid A Sunyaev, Tsunefumi Mizuno, Caroline Kilbourne, Yuichiro Ezoe, Hiroshi Nakajima, Kosuke Sato, Eric Miller, Kyoko Matsushita

    Publications of the Astronomical Society of Japan   2025.10

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    The X-ray Imaging and Spectroscopy Mission (XRISM), launched into low-Earth orbit in 2023, observes the reflection of solar flare X-rays in the Earth’s atmosphere as a by-product of celestial observations. Using a $\sim$1 yr data set covering 2023 October–2024 November, we report on our first results of the measurement of the metal abundance pattern and high-resolution Fe K spectroscopy. The abundances of Mg, Si, S, Ar, Ca, and Fe measured with the CCD detector Xtend during M- and X-class flares show the inverse-first-ionization-potential (inverse-FIP) effect, which is consistent with the results of Katsuda et al. (2020, ApJ, 891, 126) using the Suzaku satellite. The abundances of Si, S, and Ar are found to decrease with increasing flare magnitude, which is consistent with the theoretical model by Laming (2021, ApJ, 909, 17), whereas Ca exhibits an opposite trend. The large effective area and field of view of Xtend allow us to trace the evolution of the abundances in several X-class flare loops on a timescale of a few 100 s, finding an enrichment of low-FIP elements before flare peaks. The high-resolution Fe K spectrum obtained with the microcalorimeter Resolve successfully separates the Rayleigh- and Compton-scattered Fe xxiv$/$xxv lines and neutral or low-ionized Fe K$\alpha$ lines. The neutral/low-ionized Fe K$\alpha$ equivalent width shows an anti-correlation with hard X-ray flux with a best-fitting power-law slope of $-0.14 \pm 0.09$, suggesting that hard X-rays from flare loops are stimulating the Fe K$\alpha$ fluorescence. This work demonstrates that XRISM can be a powerful tool in the field of solar physics, offering valuable high-statistic CCD data and high-resolution microcalorimeter spectra in the energy range extending to the Fe K band.

    DOI： 10.1093/pasj/psaf108

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  • A Bragg reflection x-ray polarimeter using curved crystals

    Yohko Tsuboi, Haruka Sugai, Tomokage Yoneyama, Takahiro Seguchi, Ayaka Mitsubori, Ryo Iizuka, Yoshitomo Maeda, Daiki Ishi, Hikaru Uebayashi

    Optics for EUV, X-Ray, and Gamma-Ray Astronomy XII   19 - 19   2025.9

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.3064336

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  • Solar x-ray CubeSat for high-resolution spectroscopic polarimetry with x-ray SOI sensor and bent Bragg crystals

    Hikaru Uebayashi, Takeshi G. Tsuru, Teruaki Enoto, Hiroyuki Uchida, Ayumi Asai, Kosuke Namekata, Naoki Tsuji, Shun Inoue, Yohko Tsuboi, Tomokage Yoneyama, Haruka Sugai, Takahiro Seguchi, Toru Tamagawa, Yoshitomo Maeda, Ryusei Komatsu, Takayuki Shihara, Seang Shim, Yusuke Sawanishi, Riko Shimizu, Tatsuya Narumi, Hideki Yoshikado, Raiki Kudo, Takuro Mito, Shota Ito, Masaki Numazawa, Daiki Ishi

    UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIV   61 - 61   2025.9

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.3063714

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  • Performance of a 1U size ParaDAXAS, a Bragg reflection polarization spectrometer designed for use onboard CubeSat

    Haruka Sugai, Yohko Tsuboi, Tomokage Yoneyama, Takahiro Seguchi, Ryota Inoue, Yuiko Ishihara, Ayaka Mitsubori, Yoshitomo Maeda, Daiki Ishi, Hikaru Uebayashi

    UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIV   51 - 51   2025.9

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.3063839

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  • Initial in-orbit operation of the soft X-ray spectrometer Resolve onboard the X-ray imaging and spectroscopy mission satellite

    Yoshitomo Maeda, Ryuichi Fujimoto, Hisamitsu Awaki, Jesus C. Balleza, Kim R. Barnstable, Thomas G. Bialas, Rozenn Boissay-Malaquin, Gregory V. Brown, Edgar R. Canavan, Timothy M. Carnahan, Meng P. Chiao, Brian J. Comber, Elisa Costantini, Renata S. Cumbee, Jan-Willem den Herder, Johannes Dercksen, Cor P. de Vries, Michael J. DiPirro, Megan E. Eckart, Yuichiro Ezoe, Carlo Ferrigno, Nathalie Gorter, Steven M. Graham, Martin Grim, Leslie S. Hartz, Ryota Hayakawa, Takayuki Hayashi, Natalie Hell, Akio Hoshino, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Bryan L. James, Yoshiaki. Kanemaru, Richard L. Kelley, Steven J. Kenyon, Caroline A. Kilbourne, Mark O. Kimball, Shunji Kitamoto, Maurice A. Leutenegger, Dan McCammon, Brian J. McLaughlin, Joseph J. Miko, Erik van der Meer, Misaki Mizumoto, Takashi Okajima, Atsushi Okamoto, Stephane Paltani, Frederick S. Porter, Lillian S. Reichenthal, Kosuke Sato, Toshiki Sato, Yoichi Sato, Makoto Sawada, Keisuke Shinozaki, Russell F. Shipman, Peter J. Shirron, Gary A. Sneiderman, Yang Soong, Richard Szymkiewicz, Andrew E. Szymkowiak, Yoh Takei, Mai Takeo, Tsubasa Tamba, Keisuke Tamura, Masahiro Tsujimoto, Yuusuke Uchida, Stephen Wasserzug, Michael C. Witthoeft, Rob Wolfs, Shinya Yamada, Susumu Yasuda

    Journal of Astronomical Telescopes, Instruments, and Systems   11 ( 04 )   2025.8

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    Publishing type：Research paper (scientific journal)   Publisher：SPIE-Intl Soc Optical Eng  

    DOI： 10.1117/1.jatis.11.4.042014

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  • Thermal and kinematic properties of ejecta in SN1987A revealed by XRISM

    Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V Brown, Lia Corrales, Elisa Costantini, Renata Cumbee, María Díaz Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E Eckart, Dominique Eckert, Teruaki Enoto, Satoshi Eguchi, Yuichiro Ezoe, Adam Foster, Ryuichi Fujimoto, Yutaka Fujita, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi C Gallo, Javier A García, Liyi Gu, Matteo Guainazzi, Roberta Giuffrida, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Ann Hornschemeier, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Jelle Kaastra, Timothy Kallman, Erin Kara, Satoru Katsuda, Yoshiaki Kanemaru, Richard Kelley, Ryunosuke Kikuchi, Caroline Kilbourne, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice A Leutenegger, Michael Loewenstein, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Tsukasa Matsushima, Kyoko Matsushita, Dan McCammon, Brian McNamara, François Mernier, Eric D Miller, Jon M Miller, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mori, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Hiroshi Nakajima, Kazuhiro Nakazawa, Jan-Uwe Ness, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Shoji Ogawa, Anna Ogorzalek, Takashi Okajima, Naomi Ota, Stephane Paltani, Robert Petre, Paul Plucinsky, Frederick Scott Porter, Katja Pottschmidt, Kosuke Sato, Toshiki Sato, Makoto Sawada, Hiromi Seta, Megumi Shidatsu, Jiro Shimoda, Aurora Simionescu, Randall K Smith, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Makoto Tashiro, Yukikatsu Terada, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Go Tsuru, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Shutaro Ueda, Yoshihiro Ueda, Shinichiro Uno, Jacco Vink, Shin Watanabe, Brian J Williams, Satoshi Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita, Irina Zhuravleva, Marco Miceli, Vincenzo Sapienza

    Publications of the Astronomical Society of Japan   77 ( Supplement_1 )   S193 - S208   2025.8

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    We present an analysis of high-resolution spectra from the shock-heated plasmas in SN 1987A, based on an observation using the Resolve instrument onboard the X-Ray Imaging and Spectroscopy Mission (XRISM). The 1.7–10 keV Resolve spectra are accurately represented by a single-component, plane-parallel shock plasma model, with a temperature of $2.84_{-0.08}^{+0.09}$ keV and an ionization parameter of $2.64_{-0.45}^{+0.58}$ × $10^{11}\,\,{\rm s\,\, cm}^{-3}$. The Resolve spectra are also well reproduced by the 3D magneto-hydrodynamic simulation presented by Orlando et al. (2020, A&A, 636, A22) suggesting substantial contribution from the ejecta. The metal abundances obtained with Resolve align with the Large Magellanic Cloud value, indicating that the X-rays in 2024 originate from “non-metal-rich” shock-heated ejecta and the reverse shock has not reached the inner metal-rich region of ejecta. Doppler widths of the atomic lines from Si, S, and Fe correspond to velocities of 1500–1700 km s$^{-1}$, where the thermal broadening effects in this non-metal-rich plasma are negligible. Therefore, the line broadening seen in Resolve spectra is determined by the large bulk motion of ejecta. For reference, we determined a $90\%$ upper limit on non-thermal emission from a pulsar wind nebula at $4.3 \times 10^{-13}$ erg cm$^{-2}$ s$^{-1}$ in the 2–10 keV range, aligning with NuSTAR findings by Greco et al. (2022, ApJ, 931, 132). Additionally, we searched for the $^{44}$Sc K line feature and found a $1\sigma$ upper limit of $1.0 \times 10^{-6}$ photons cm$^{-2}$ s$^{-1}$, which translates to an initial $^{44}$Ti mass of approximately $2 \times 10^{-4}\, M_{\odot }$, consistent with previous X-ray to soft gamma-ray observations (Boggs et al. 2015, Science, 348, 670; Grebenev et al. 2012, Nature, 490, 373; Leising 2006, ApJ, 651, 1019).

    DOI： 10.1093/pasj/psaf056

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  • Constraining gas motion and non-thermal pressure beyond the core of the Abell 2029 galaxy cluster with XRISM

    Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V Brown, Lia Corrales, Elisa Costantini, Renata Cumbee, Maria Díaz Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E Eckart, Dominique Eckert, Satoshi Eguchi, Teruaki Enoto, Yuichiro Ezoe, Adam Foster, Ryuichi Fujimoto, Yutaka Fujita, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi C Gallo, Javier A García, Liyi Gu, Matteo Guainazzi, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Ann Hornschemeier, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Jelle Kaastra, Timothy Kallman, Erin Kara, Satoru Katsuda, Yoshiaki Kanemaru, Richard Kelley, Caroline Kilbourne, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice A Leutenegger, Michael Loewenstein, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, François Mernier, Eric Miller, Jon M Miller, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mori, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Hiroshi Nakajima, Kazuhiro Nakazawa, Jan-Uwe Ness, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Shoji Ogawa, Anna Ogorzalek, Takashi Okajima, Naomi Ota, Stephane Paltani, Robert Petre, Paul Plucinsky, Frederick S Porter, Katja Pottschmidt, Kosuke Sato, Toshiki Sato, Makoto Sawada, Hiromi Seta, Megumi Shidatsu, Aurora Simionescu, Randall Smith, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Makoto Tashiro, Yukikatsu Terada, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Go Tsuru, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Yoshihiro Ueda, Shinichiro Uno, Jacco Vink, Shin Watanabe, Brian J Williams, Satoshi Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita, Irina Zhuravleva, Tommaso Bartalesi, Stefano Ettori, Roman Kosarzycki, Lorenzo Lovisari, Tom Rose, Arnab Sarkar, Ming Sun, Prathamesh Tamhane

    Publications of the Astronomical Society of Japan   77 ( Supplement_1 )   S242 - S253   2025.8

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    We report on a detailed spectroscopic study of the gas dynamics and hydrostatic mass bias of the galaxy cluster Abell 2029, utilizing high-resolution observations from XRISM Resolve. Abell 2029, known for its cool core and relaxed X-ray morphology, provides an excellent opportunity to investigate the influence of gas motions beyond the central region. Expanding upon prior studies that revealed low turbulence and bulk motions within the core, our analysis covers regions out to the scale radius $R_{2500}$ (670 kpc) based on three radial pointings extending from the cluster center toward the northern side. We obtain accurate measurements of bulk and turbulent velocities along the line of sight. The results indicate that non-thermal pressure accounts for no more than 2% of the total pressure at all radii, with a gradual decrease outward. The observed radial trend differs from many numerical simulations, which often predict an increase in non-thermal pressure fraction at larger radii. These findings suggest that deviations from hydrostatic equilibrium are small, leading to a hydrostatic mass bias of around 2% across the observed area.

    DOI： 10.1093/pasj/psaf055

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  • Correction to: XL-Calibur measurements of polarized hard X-ray emission from the Crab

    Monthly Notices of the Royal Astronomical Society: Letters   543 ( 1 )   L6 - L7   2025.8

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    DOI： 10.1093/mnrasl/slaf081

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  • Kinematic Evidence for Bipolar Ejecta Flows in the Galactic Supernova Remnant W49B

    Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Lia Corrales, Elisa Costantini, Renata Cumbee, María Díaz Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Dominique Eckert, Satoshi Eguchi, Teruaki Enoto, Yuichiro Ezoe, Adam Foster, Ryuichi Fujimoto, Yutaka Fujita, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi Gallo, Javier A. García, Liyi Gu, Matteo Guainazzi, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Ann Hornschemeier, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Jelle Kaastra, Timothy Kallman, Erin Kara, Satoru Katsuda, Yoshiaki Kanemaru, Richard L. Kelley, Caroline A. Kilbourne, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice A. Leutenegger, Michael Loewenstein, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, François Mernier, Eric D. Miller, Jon M. Miller, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mori, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Hiroshi Nakajima, Kazuhiro Nakazawa, Jan-Uwe Ness, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Shoji Ogawa, Anna Ogorzalek, Takashi Okajima, Naomi Ota, Stephane Paltani, Robert Petre, Paul Plucinsky, Frederick S. Porter, Katja Pottschmidt, Hidetoshi Sano, Kosuke Sato, Toshiki Sato, Makoto Sawada, Hiromi Seta, Megumi Shidatsu, Aurora Simionescu, Randall Smith, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Makoto Tashiro, Yukikatsu Terada, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi G. Tsuru, Ayşegül Tümer, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Yoshihiro Ueda, Shinichiro Uno, Jacco Vink, Shin Watanabe, Brian J. Williams, Satoshi Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita, Irina Zhuravleva, Yuki Amano, Amy Gall, Sharon Mitrani, Kaito Murakami, Roi Rahin, Nari Suzuki

    The Astrophysical Journal Letters   988 ( 2 )   L58 - L58   2025.7

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    Publishing type：Research paper (scientific journal)   Publisher：American Astronomical Society  

    Abstract

    W49B is a unique Galactic supernova remnant with centrally peaked, “bar”-like ejecta distribution, which was once considered evidence for a hypernova origin that resulted in a bipolar ejection of the stellar core. However, chemical abundance measurements contradict this interpretation. Closely connected to the morphology of the ejecta is its velocity distribution, which provides critical details for understanding the explosion mechanism. We report the first ever observational constraint on the kinematics of the ejecta in W49B using the Resolve microcalorimeter spectrometer on the X-ray Imaging and Spectroscopy Mission (XRISM). Using XRISM/Resolve, we measured the line-of-sight velocity traced by the Fe Heα emission, which is the brightest feature in the Resolve spectrum, to vary by ±300 km s−1 with a smooth east-to-west gradient of a few tens of kilometers per second per parsec along the major axis. Similar trends in the line-of-sight velocity structure were found for other Fe-group elements Cr and Mn, traced by the Heα emission, and also for intermediate-mass elements Si, S, Ar, and Ca, traced by the Lyα emission. The discovery of the east–west gradient in the line-of-sight velocity, together with the absence of a twin-peaked line profile or enhanced broadening in the central region, clearly rejects the equatorially expanding disk model. In contrast, the observed velocity structure suggests bipolar flows reminiscent of a bipolar explosion scenario. An alternative scenario would be a collimation of the ejecta by an elongated cavity sculpted by bipolar stellar winds.

    DOI： 10.3847/2041-8213/ade138

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    Other Link： https://iopscience.iop.org/article/10.3847/2041-8213/ade138/pdf

  • Pre- and post-launch operation of the Resolve soft X-ray spectrometer onboard the XRISM satellite

    Kosuke Sato, Yoshitaka Ishisaki, Richard L. Kelley, Hisamitsu Awaki, Jesus C. Balleza, Kim R. Barnstable, Thomas G. Bialas, Rozenn Boissay-Malaquin, Gregory V. Brown, Edgar R. Canavan, Renata S. Cumbee, Timothy M. Carnahan, Meng P. Chiao, Brian J. Comber, Elisa Costantini, Jan-Willem den Herder, Johannes Dercksen, Cor P. de Vries, Michael J. DiPirro, Megan E. Eckart, Yuichiro Ezoe, Carlo Ferrigno, Ryuichi Fujimoto, Nathalie Gorter, Steven M. Graham, Martin Grim, Leslie S. Hartz, Ryota Hayakawa, Takayuki Hayashi, Natali Hell, Akio Hoshino, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Bryan L. James, Yoshiaki Kanemaru, Steven J. Kenyon, Caroline A. Kilbourne, Mark O. Kimball, Shunji Kitamoto, Maurice A. Leutenegger, Yoshitomo Maeda, Dan McCammon, Brian J. McLaughlin, Joseph J. Miko, Erik van der Meer, Misaki Mizumoto, Takashi Okajima, Atsushi Okamoto, Stephane Paltani, Frederick S. Porter, Lillian S. Reichenthal, Toshiki Sato, Yoichi Sato, Makoto Sawada, Keisuke Shinozaki, Russell Shipman, Peter J. Shirron, Gary A. Sneiderman, Yang Soong, Richard Szymkiewicz, Andrew E. Szymkowiak, Yoh Takei, Mai Takeo, Tsubasa Tamba, Keisuke Tamura, Masahiro Tsujimoto, Yuusuke Uchida, Stephen Wasserzug, Michael C. Witthoeft, Rob Wolfs, Shinya Yamada, Susumu Yasuda, Noriko Y. Yamasaki, Seiji Yoshida

    Journal of Astronomical Telescopes, Instruments, and Systems   11 ( 04 )   2025.7

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    Publishing type：Research paper (scientific journal)   Publisher：SPIE-Intl Soc Optical Eng  

    DOI： 10.1117/1.jatis.11.4.042020

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  • XRISM Forecast for the Coma Cluster: Stormy, with a Steep Power Spectrum

    Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Lia Corrales, Elisa Costantini, Renata Cumbee, Maria Diaz Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Dominique Eckert, Satoshi Eguchi, Teruaki Enoto, Yuichiro Ezoe, Adam Foster, Ryuichi Fujimoto, Yutaka Fujita, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi Gallo, Javier A. García, Liyi Gu, Matteo Guainazzi, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Ann Hornschemeier, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Jelle Kaastra, Timothy Kallman, Erin Kara, Satoru Katsuda, Yoshiaki Kanemaru, Richard Kelley, Caroline Kilbourne, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice Leutenegger, Michael Loewenstein, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian McNamara, François Mernier, Eric D. Miller, Jon M. Miller, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mori, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Hiroshi Nakajima, Kazuhiro Nakazawa, Jan-Uwe Ness, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Shoji Ogawa, Anna Ogorzałek, Takashi Okajima, Naomi Ota, Stéphane Paltani, Robert Petre, Paul Plucinsky, Frederick S. Porter, Katja Pottschmidt, Kosuke Sato, Toshiki Sato, Makoto Sawada, Hiromi Seta, Megumi Shidatsu, Aurora Simionescu, Randall Smith, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Makoto Tashiro, Yukikatsu Terada, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Ayşegül Tümer, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Shutaro Ueda, Yoshihiro Ueda, Shinichiro Uno, Jacco Vink, Shin Watanabe, Brian J. Williams, Satoshi Yamada, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita, Irina Zhuravleva, Andrew Fabian, Dylan Nelson, Nobuhiro Okabe, Annalisa Pillepich, Cicely Potter, Manon Regamey, Kosei Sakai, Mona Shishido, Nhut Truong, Daniel R. Wik, John ZuHone

    The Astrophysical Journal Letters   985 ( 1 )   L20 - L20   2025.5

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    Publishing type：Research paper (scientific journal)   Publisher：American Astronomical Society  

    Abstract

    The XRISM Resolve microcalorimeter array measured the velocities of hot intracluster gas at two positions in the Coma galaxy cluster: squares at the center and at 6 (170 kpc) to the south. We find the line-of-sight velocity dispersions in those regions to be σ z  = 208 ± 12 km s−1 and 202 ± 24 km s−1, respectively. The central value corresponds to a 3D Mach number of M = 0.24 ± 0.015 and a ratio of the kinetic pressure of small-scale motions to thermal pressure in the intracluster plasma of only 3.1% ± 0.4%, at the lower end of predictions from cosmological simulations for merging clusters like Coma, and similar to that observed in the cool core of the relaxed cluster A2029. Meanwhile, the gas in both regions exhibits high line-of-sight velocity differences from the mean velocity of the cluster galaxies, Δv z  = 450 ± 15 km s−1 and 730 ± 30 km s−1, respectively. A small contribution from an additional gas velocity component, consistent with the cluster optical mean, is detected along a sight line near the cluster center. The combination of the observed velocity dispersions and bulk velocities is not described by a Kolmogorov velocity power spectrum of steady-state turbulence; instead, the data imply a much steeper effective slope (i.e., relatively more power at larger linear scales). This may indicate either a very large dissipation scale, resulting in the suppression of small-scale motions, or a transient dynamic state of the cluster, where large-scale gas flows generated by an ongoing merger have not yet cascaded down to small scales.

    DOI： 10.3847/2041-8213/add2f6

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  • In-orbit performance of the soft X-ray imaging telescope Xtend aboard XRISM

    Hiroyuki Uchida, Koji Mori, Hiroshi Tomida, Hiroshi Nakajima, Hirofumi Noda, Takaaki Tanaka, Hiroshi Murakami, Hiromasa Suzuki, Shogo Benjamin Kobayashi, Tomokage Yoneyama, Kouichi Hagino, Kumiko Kawabata Nobukawa, Hideki Uchiyama, Masayoshi Nobukawa, Hironori Matsumoto, Takeshi Go Tsuru, Makoto Yamauchi, Isamu Hatsukade, Hirokazu Odaka, Takayoshi Kohmura, Kazutaka Yamaoka, Tessei Yoshida, Yoshiaki Kanemaru, Daiki Ishi, Tadayasu Dotani, Masanobu Ozaki, Hiroshi Tsunemi, Keitaro Miyazaki, Kohei Kusunoki, Yoshinori Otsuka, Haruhiko Yokosu, Wakana Yonemaru, Kazuhiro Ichikawa, Hanako Nakano, Reo Takemoto, Tsukasa Matsushima, Reika Urase, Jun Kurashima, Kotomi Fuchi, Kaito Hayakawa, Masahiro Fukuda, Shun Inoue, Yuma Aoki, Kouta Takayama, Takashi Sako, Marina Yoshimoto, Kohei Shima, Mayu Higuchi, Kaito Ninoyu, Daiki Aoki, Shun Tsunomachi, Takashi Okajima, Manabu Ishida, Yoshitomo Maeda, Takayuki Hayashi, Keisuke Tamura, Rozenn Boissay-Malaquin, Toshiki Sato, Mai Takeo, Asca Miyamoto, Gakuto Matsumoto, Megan E Eckart, Natalie Hell, Maurice A Leutenegger, Kiyoshi Hayashida

    Publications of the Astronomical Society of Japan   77 ( Supplement_1 )   S23 - S38   2025.5

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    We present a summary of the in-orbit performance of the soft X-ray imaging telescope Xtend onboard the X-Ray Imaging and Spectroscopy Mission (XRISM), based on in-flight observation data, including first-light celestial objects, calibration sources, and results from the cross-calibration campaign with other currently operating X-ray observatories. XRISM/Xtend has a large field of view of ${38{^{\prime }_{. } }5}$  $\times$  ${38{^{\prime }_{. } }5}$, covering an energy range of 0.4–13 keV, as demonstrated by the first-light observation of the galaxy cluster Abell 2319. It also features an energy resolution of 170–180 eV at 6 keV, which meets the mission requirement and enables us to resolve He-like and H-like Fe K$\alpha$ lines. Throughout the observation during the performance verification phase, we confirm that two issues identified in the Soft X-ray Imager (SXI) onboard the previous Hitomi mission—light leakage and crosstalk events—are addressed and suppressed in the case of Xtend. A joint cross-calibration observation of the bright quasar 3C 273 results in an effective area measured to be $\sim$420 cm$^{2}$ at1.5 keV and $\sim$310 cm$^{2}$ at 6.0 keV, which matches values obtained in ground tests. We also continuously monitor the health of Xtend by analyzing overclocking data, calibration source spectra, and day-Earth observations; the readout noise is stable and low, and contamination is negligible even one year after launch. A low background level compared with other major X-ray instruments onboard satellites, combined with the largest grasp ($\Omega _{\rm eff}\sim 60$ cm$^2$ deg$^2$) of Xtend, will not only support Resolve analysis, but also enable significant scientific results on its own. This includes near-future follow-up observations and transient searches in the context of time-domain and multi-messenger astrophysics.

    DOI： 10.1093/pasj/psaf030

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  • X-Ray Imaging and Spectroscopy Mission

    Makoto Tashiro, Richard Kelley, Shin Watanabe, Hironori Maejima, Lillian Reichenthal, Kenichi Toda, Leslie Hartz, Andrea Santovincenzo, Kyoko Matsushita, Hiroya Yamaguchi, Robert Petre, Brian Williams, Matteo Guainazzi, Elisa Costantini, Yoh Takei, Yoshitaka Ishisaki, Ryuichi Fujimoto, Joy Henegar-Leon, Gary Sneiderman, Hiroshi Tomida, Koji Mori, Hiroshi Nakajima, Yukikatsu Terada, Matthew Holland, Michael Loewenstein, Eric Miller, Makoto Sawada, Timothy Kallman, Jelle Kaastra, Chris Done, Teruaki Enoto, Aya Bamba, Lia Corrales, Yoshihiro Ueda, Erin Kara, Irina Zhuravleva, Yutaka Fujita, Yoshitaka Arai, Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Chris Baluta, Nobutaka Bando, Ehud Behar, Thomas Bialas, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V Brown, Meng Chiao, Renata Cumbee, Cor de Vries, Jan-Willem den Herder, María Díaz Trigo, Michael DiPirro, Tadayasu Dotani, Jacobo Ebrero Carrero, Ken Ebisawa, Megan Eckart, Dominique Eckert, Satoshi Eguchi, Yuichiro Ezoe, Carlo Ferrigno, Adam Foster, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi C Gallo, Javier Garcia Martinez, Nathalie Gorter, Martin Grim, Liyi Gu, Kouichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Takafumi Horiuchi, Ann Hornschemeier, Akio Hoshino, Yuto Ichinohe, Chisato Ikuta, Ryo Iizuka, Daiki Ishi, Manabu Ishida, Naoki Ishihama, Kumi Ishikawa, Kosei Ishimura, Tess Jaffe, Satoru Katsuda, Yoshiaki Kanemaru, Steven Kenyon, Caroline Kilbourne, Mark Kimball, Shunji Kitamoto, Shogo Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice A Leutenegger, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Keiichi Matsuzaki, Dan McCammon, Brian McLaughlin, Brian McNamara, François Mernier, Joseph Miko, Jon M Miller, Kenji Minesugi, Shinji Mitani, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Kazuhiro Nakazawa, Chikara Natsukari, Jan-Uwe Ness, Kenichiro Nigo, Mari Nishiyama, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Mina Ogawa, Shoji Ogawa, Anna Ogorzalek, Takashi Okajima, Atsushi Okamoto, Naomi Ota, Masanobu Ozaki, Stephane Paltani, Paul Plucinsky, F Scott Porter, Katja Pottschmidt, Jose Antonio Quero, Takahiro Sasaki, Kosuke Sato, Rie Sato, Toshiki Sato, Yoichi Sato, Hiromi Seta, Maki Shida, Megumi Shidatsu, Shuhei Shigeto, Russel Shipman, Keisuke Shinozaki, Peter Shirron, Aurora Simionescu, Randall K Smith, Yang Soong, Hiromasa Suzuki, Andrew Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Yuichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Go Tsuru, Hiroyuki Uchida, Nagomi Uchida, Yuusuke Uchida, Hideki Uchiyama, Shinichiro Uno, Jacco Vink, Michael Witthoeft, Rob Wolfs, Satoshi Yamada, Shinya Yamada, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Keiichi Yanagase, Tahir Yaqoob, Susumu Yasuda, Tomokage Yoneyama, Tessei Yoshida, Mihoko Yukita

    Publications of the Astronomical Society of Japan   77 ( Supplement_1 )   S1 - S9   2025.4

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    The X-Ray Imaging and Spectroscopy Mission (XRISM) is a joint mission between the Japan Aerospace Exploration Agency (JAXA) and the National Aeronautics and Space Administration (NASA) in collaboration with the European Space Agency (ESA). In addition to the three space agencies, universities and research institutes from Japan, North America, and Europe have joined to contribute to developing satellite and onboard instruments, data-processing software, and the scientific observation program. XRISM is the successor to the ASTRO-H (Hitomi) mission, which ended prematurely in 2016. Its primary science goal is to examine astrophysical problems with precise, high-resolution X-ray spectroscopy. XRISM promises to discover new horizons in X-ray astronomy. It carries a 6 × 6 pixelized X-ray microcalorimeter on the focal plane of an X-ray mirror assembly (Resolve) and a co-aligned X-ray CCD camera (Xtend) that covers the same energy band over a large field of view. XRISM utilizes the Hitomi heritage, but all designs were reviewed. The attitude and orbit control system was improved in hardware and software. The spacecraft was launched from the JAXA Tanegashima Space Center on 2023 September 6 (UTC). During the in-orbit commissioning phase, the onboard components were activated. Although the gate valve protecting the Resolve sensor with a thin beryllium X-ray entrance window was not yet opened, scientific observation started in 2024 February with the planned performance verification observation program. The nominal observation program commenced with the following guest observation program beginning in 2024 September.

    DOI： 10.1093/pasj/psaf023

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  • XL-Calibur measurements of polarized hard X-ray emission from the Crab

    Hisamitsu Awaki, Matthew G Baring, Richard Bose, Dana Braun, Jacob Casey, Sohee Chun, Pavel Galchenko, Ephraim Gau, Kazuho Goya, Tomohiro Hakamata, Takayuki Hayashi, Scott Heatwole, Kun Hu, Ryo Imazawa, Daiki Ishi, Manabu Ishida, Fabian Kislat, Mózsi Kiss, Kassi Klepper, Henric Krawczynski, Haruki Kuramoto, R James Lanzi, Lindsey Lisalda, Yoshitomo Maeda, Filip af Malmborg, Hironori Matsumoto, Shravan Vengalil Menon, Aiko Miyamoto, Asca Miyamoto, Takuya Miyazawa, Kaito Murakami, Azuki Nagao, Takashi Okajima, Mark Pearce, Brian F Rauch, Nicole Rodriguez Cavero, Kohei Shima, Kentaro Shirahama, Carlton M Snow, Sean Spooner, Hiromitsu Takahashi, Sayana Takatsuka, Keisuke Tamura, Kojiro Tanaka, Yuusuke Uchida, Andrew Thomas West, Eric A Wulf, Masato Yokota, Marina Yoshimoto

    Monthly Notices of the Royal Astronomical Society: Letters   540 ( 1 )   L34 - L40   2025.3

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    ABSTRACT

    We report measurements of the linear polarization degree (PD) and angle (PA) for hard X-ray emission from the Crab pulsar and wind nebula. Measurements were made with the XL-Calibur ($\sim$15–80 keV) balloon-borne Compton-scattering polarimeter in July 2024. The polarization parameters are determined using a Bayesian analysis of Stokes parameters obtained from X-ray scattering angles. Well-constrained ($\sim 8.5\sigma$) results are obtained for the polarization of the $\sim$19–64 keV signal integrated over all pulsar phases: PD = (25.1$\pm$2.9) per cent and PA = (129.8$\pm 3.2)^\circ$. In the off-pulse (nebula-dominated) phase range, the PD is constrained at $\sim 4.5\sigma$ and is compatible with the phase-integrated result. The PA of the nebular hard X-ray emission aligns with that measured by IXPE in the 2–8 keV band for the toroidal inner region of the pulsar wind nebula, where the hard X-rays predominantly originate. For the main pulsar peak, PD = (32.8$^{+18.2}_{-28.5}$) per cent and PA = (156.0 $\pm$ 21.7)$^\circ$, while for the second peak (inter-pulse), PD = (0.0$^{+33.6}_{-0.0}$) per cent and PA = (154.5 $\pm$ 34.5)$^\circ$. A low level of polarization in the pulsar peaks likely does not favour emission originating from the inner regions of the pulsar magnetosphere. Discriminating between Crab pulsar emission models will require deeper observations, e.g. with a satellite-borne hard X-ray polarimeter.

    DOI： 10.1093/mnrasl/slaf026

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    Other Link： https://academic.oup.com/mnrasl/article-pdf/540/1/L34/62464740/slaf026.pdf

  • Overview and inflight performance of the resolve high-resolution soft X-Ray spectrometer on the X-Ray imaging and spectroscopy mission

    Richard L. Kelley, Hisamitsu Awaki, Jesus C. Balleza, Kim R. Barnstable, Thomas G. Bialas, Rozenn Boissay-Malaquin, Gregory V. Brown, Edgar R. Canavan, Timothy M. Carnahan, Meng P. Chiao, Brian J. Comber, Elisa Costantini, Renata S. Cumbee, Jan-Willem A. den Herder, Johannes Dercksen, Cor de Vries, Michael J. DiPirro, Megan E. Eckart, Yuichiro Ezoe, Carlo Ferrigno, Ryuichi Fujimoto, Nathalie Q. S. Gorter, Steven M. Graham, Martin Grim, Leslie S. Hartz, Ryota Hayakawa, Takayuki Hayashi, Natalie Hell, Akio Hoshino, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Bryan L. James, Yoshiaki Kanemaru, Steven J. Kenyon, Caroline A. Kilbourne, Mark O. Kimball, Shunji Kitamoto, Maurice A. Leutenegger, Yoshitomo Maeda, Dan McCammon, Brian J. McLaughlin, Joseph J. Miko, Erik van der Meer, Misaki Mizumoto, Takashi Okajima, Atsushi Okamoto, Stéphane Paltani, Frederick S. Porter, Lillian S. Reichenthal, Kosuke Sato, Toshiki Sato, Yohichi Sato, Makoto Sawada, Keisuke Shinozaki, Russell F. Shipman, Peter J. Shirron, Gary A. Sneiderman, Soong Yang, Richard Szymkiewicz, Andrew E. Szymkowiak, Yoh Takei, Mai Takeo, Tsubasa Tamba, Keisuke Tamura, Masahiro Tsujimoto, Yuusuke Uchida, Stephen Wasserzug, Michael C. Witthoeft, Rob Wolfs, Shinya Yamada, Susumu Yasuda

    Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray   55 - 55   2024.8

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.3017731

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  • Initial in-orbit operation of the soft x-ray spectrometer Resolve onboard the XRISM satellite

    Yoshitomo Maeda, Ryuichi Fujimoto, Hisamitsu Awaki, Jesus C. Balleza, Kim R. Barnstable, Thomas G. Bialas, Rozenn Boissay-Malaquin, Gregory V. Brown, Edgar R. Canavan, Timothy M. Carnahan, Meng P. Chiao, Brian J. Comber, Elisa Costantini, Renata S. Cumbee, Jan-Willem A. den Herder, Johannes Dercksen, Cor P. de Vries, Michael J. DiPirro, Megan E. Eckart, Yuichiro Ezoe, Carlo Ferrigno, Nathalie Q. S. Gorter, Steven M. Graham, Martin Grim, Leslie S. Hartz, Ryota Hayakawa, Takayuki Hayashi, Natalie Hell, Akio Hoshino, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Bryan L. James, Yoshiaki Kanemaru, Richard L. Kelley, Steven J. Kenyon, Caroline A. Kilbourne, Mark O. Kimball, Shunji Kitamoto, Maurice A. Leutenegger, Dan McCammon, Brian J. McLaughlin, Joseph J. Miko, Erik van der Meer, Misaki Mizumoto, Takashi Okajima, Atsushi Okamoto, Stéphane Paltani, Frederick S. Porter, Lillian S. Reichenthal, Kosuke Sato, Toshiki Sato, Yohichi Sato, Makoto Sawada, Keisuke Shinozaki, Russell F. Shipman, Peter J. Shirron, Gary A. Sneiderman, Soong Yang, Richard Szymkiewicz, Andrew E. Szymkowiak, Yoh Takei, Mai Takeo, Tsubasa Tamba, Keisuke Tamura, Masahiro Tsujimoto, Yuusuke Uchida, Stephen Wasserzug, Michael C. Witthoeft, Rob Wolfs, Shinya Yamada, Susumu Yasuda

    Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray   53 - 53   2024.8

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.3013008

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  • Development and operation status of X-Ray Imaging and Spectroscopy Mission (XRISM)

    Makoto S. Tashiro, Shin Watanabe, Hironori Maejima, Kenichi Toda, Kyoko Matsushita, Hiroya Yamaguchi, Richard L. Kelley, Lillian S. Reichenthal, Leslie S. Hartz, Robert Petre, Brian J. Williams, Matteo Guainazzi, Andrea Santovincenzo, Elisa Costantini, Yoh Takei, Yoshitaka Ishisaki, Ryuichi Fujimoto, Joy Henegar-Leon, Gary Sneiderman, Hiroshi Tomida, Koji Mori, Hiroshi Nakajima, Yukikatsu Terada, Matt Holland, Micheal Loewenstein, Tomothey Kallman, Jelle Kaastra, Eric Miller, Makoto Sawada, Chris Done, Teruaki Enoto, Aya Bamba, Paul Plucinsky, Yoshitaka Ueda, Erin Kara, Irina Zhuravleva, Yutaka Fujita, Jose Antonio Quero, Yoshitaka Arai, Marc Audard, Hisamitsu Awaki, Chris Baluta, Nobutaka Bando, Ehud Behar, Thomas Bialas, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Meng Chiao, Lia Corrales, Renata Cumbee, Cor de Vries, Jan-Willem den Herder, Maria Diaz-Trigo, Michael DiPirro, Tadayasu Dotani, Jacobo Ebrero Carrero, Ken Ebisawa, Megan Eckart, Dominique Eckart, Satoshi Eguchi, Yuichiro Ezoe, Carlo Ferrgno, Adam Foster, Yasushi Fukazawa, Kotaro Fukushima, Akihiro Furuzawa, Luigi Gallo, Nathalie Gorter, Martin Grim, Liyi Gu, Koichi Hagino, Kenji Hamaguchi, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Natalie Hell, Edmund Hodges-Kluck, Takafumi Horiuchi, Ann Hornschemeier, Akio Hoshino, Yuto Ichinohe, Chisato Ikuta, Ryo Iizuka, Daiki Ishi, Manabu Ishida, Naoki Ishihama, Kumi Ishikawa, Kosei Ishimura, Tess Jaffe, Satoru Katsuda, Yoshiaki Kanemaru, Steven Kenyon, Caroline Kilbourne, Mark Kimball, Shunji Kitamoto, Shogo Kobayashi, Akihide Kobayashi, Takayoshi Kohmura, Aya Kubota, Maurice Leutenegger, Muzi Li, Yoshitomo Maeda, Maxim Markevitch, Hironori Matsumoto, Keiichi Matsuzaki, Dan McCammon, Brian McLaughlin, Brian McNamara, Josegh Miko, Jon Miller, Kenji Minesugi, Shinji Mitani, Ikuyuki Mitsuishi, Misaki Mizumoto, Tsunefumi Mizuno, Koji Mukai, Hiroshi Murakami, Richard Mushotzky, Kazuhiro Nakazawa, Chikara Natsukari, Jan-Uwe Ness, Kenichiro Nigo, Mari Nishiyama, Kumiko Nobukawa, Masayoshi Nobukawa, Hirofumi Noda, Hirokazu Odaka, Mina Ogawa, Shoji Ogawa, Takashi Okajima, Atsushi Okamoto, Naomi Ota, Masanobu Ozaki, Stephane Paltani, F. Scott Porter, Katja Pottschmidt, Takahiro Sasaki, Kosuke Sato, Rie Sato, Toshiki Sato, Yoichi Sato, Hiromi Seta, Maki Shida, Megumi Shidatsu, Shuhei Shigeto, Russel Shipman, Keisuke Shinozaki, Peter Shirron, Aurora Simionescu, Randall Smith, Young Soong, Hiromasa Suzuki, Andy Szymkowiak, Hiromitsu Takahashi, Mai Takeo, Toru Tamagawa, Keisuke Tamura, Takaaki Tanaka, Atsushi Tanimoto, Yoichi Terashima, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Hiroyuki Uchida, Nagomi Ucghida, Yuusuke Uchida, Hideki Uchiyama, Shinichiro Uno, Erik Van der Meer, Jacco Vink, Michael Wittheof, Rob Wolf, Satoshi Yamada, Shinya Yamada, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Keiichi Yamagase, Tahir Yaqoob, Susumu Yasuda, Tomokage Yoneyama, Tessei Yoshida

    Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray   52 - 52   2024.8

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.3019325

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  • Lobster eye x-ray optics fabricated with MEMS technologies

    Kumi Ishikawa, Yuichiro Ezoe, Masaki Numazawa, Daiki Ishi, Rei Ishikawa, Yudai Yamada, Hiromi Morishita, Yukine Tsuji, Takatoshi Murakawa, Luna Sekiguchi, Daiki Morimoto, Aoi Ishimure, Yuto Ogasawara, Shunei Miyauchi

    Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray   197 - 197   2024.8

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.3020780

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  • Development of soft x-ray CMOS camera for the GEO-X mission

    Yuki K. Satoh, Hiroshi Nakajima, Shoei Yamanoi, Naoki Yokomizo, Junko S. Hiraga, Kouichi Hagino, Yuichiro Ezoe, Daiki Ishi, Masaki Numazawa

    Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray   218 - 218   2024.8

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.3018816

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  • Development of ultra-lightweight X-ray telescopes fabricated with MEMS technologies for GEO-X

    Masaki Numazawa, Yuichiro Ezoe, Kumi Ishikawa, Daiki Ishi, Hiromi Morishita, Yukine Tsuji, Luna Sekiguchi, Takatoshi Murakawa, Yudai Yamada, Rei Ishikawa, Daiki Morimoto, Aoi Ishimure, Shunei Miyauchi, Yuto Ogasawara, Hiroshi Nakajima, Yuki K. Satoh, Ikuyuki Mitsuishi, Yoshiaki Kanamori, Kohei Morishita, Kazuhisa Mitsuda

    Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray   284 - 284   2024.8

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.3020669

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  • Status of geospace x-ray imager mission (GEO-X)

    Yuichiro Ezoe, Ryu Funase, Harunori Nagata, Yoshizumi Miyoshi, Hiroshi Nakajima, Ikuyuki Mitsuishi, Kumi Ishikawa, Masaki Numazawa, Yuki Sato, Yosuke Kawabata, Ryota Fuse, Shintaro Nakajima, Ralf Boden, Landon Kamps, Yuki Nobuhara, Shota Hirai, Tomokage Yoneyama, Kouichi Hagino, Yosuke Matsumoto, Keisuke Hosokawa, Satoshi Kasahara, Daiki Ishi, Junko S. Hiraga, Kazuhisa Mitsuda, Masaki Fujimoto, Munetaka Ueno, Atsushi Yamazaki, Hiroshi Hasegawa, Takefumi Mitani, Yasuhiro Kawakatsu, Takahiro Iwata, Hiroyuki Koizumi, Hironori Sahara, Yoshiaki Kanamori, Kohei Morishita

    Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray   89 - 89   2024.8

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.3018746

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  • Pre- and post-launch operation of the soft x-ray spectrometer Resolve on board the XRISM satellite

    Kosuke Sato, Yoshitaka Ishisaki, Richard L. Kelley, Hisamitsu Awaki, Jesus C. Balleza, Kim R. Barnstable, Thomas G. Bialas, Rozenn Boissay-Malaquin, Gregory V. Brown, Edgar R. Canavan, Renata S. Cumbee, Timothy M. Carnahan, Meng P. Chiao, Brian J. Comber, Elisa Costantini, Jan-Willem A. den Herder, Johannes Dercksen, Cor de Vries, Michael J. DiPirro, Megan E. Eckart, Yuichiro Ezoe, Carlo Ferrigno, Ryuichi Fujimoto, Nathalie Q. S. Gorter, Steven M. Graham, Martin Grim, Leslie S. Hartz, Ryota Hayakawa, Takayuki Hayashi, Natalie Hell, Akio Hoshino, Yuto Ichinohe, Daiki Ishi, Manabu Ishida, Kumi Ishikawa, Bryan L. James, Yoshiaki Kanemaru, Steven J. Kenyon, Caroline A. Kilbourne, Mark O. Kimball, Shunji Kitamoto, Maurice A. Leutenegger, Yoshitomo Maeda, Dan McCammon, Brian J. McLaughlin, Joseph J. Miko, Erik van der Meer, Misaki Mizumoto, Takashi Okajima, Atsushi Okamoto, Stéphane Paltani, Frederick S. Porter, Lillian S. Reichenthal, Toshiki Sato, Yohichi Sato, Makoto Sawada, Keisuke Shinozaki, Russell F. Shipman, Peter J. Shirron, Gary A. Sneiderman, Soong Yang, Richard Szymkiewicz, Andrew E. Szymkowiak, Yoh Takei, Mai Takeo, Tsubasa Tamba, Keisuke Tamura, Masahiro Tsujimoto, Yuusuke Uchida, Stephen Wasserzug, Michael C. Witthoeft, Rob Wolfs, Shinya Yamada, Susumu Yasuda, Seiji Yoshida

    Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray   232 - 232   2024.8

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.3019327

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  • GEOspace X-ray imager (GEO-X)

    Yuichiro Ezoe, Ryu Funase, Harunori Nagata, Yoshizumi Miyoshi, Hiroshi Nakajima, Ikuyuki Mitsuishi, Kumi Ishikawa, Masaki Numazawa, Yosuke Kawabata, Shintaro Nakajima, Ryota Fuse, Ralf C. Boden, Landon Kamps, Tomokage Yoneyama, Kouichi Hagino, Yosuke Matsumoto, Keisuke Hosokawa, Satoshi Kasahara, Junko Hiraga, Kazuhisa Mitsuda, Masaki Fujimoto, Munetaka Ueno, Atsushi Yamazaki, Hiroshi Hasegawa, Takefumi Mitani, Yasuhiro Kawakatsu, Takahiro Iwata, Hiroyuki Koizumi, Hironori Sahara, Yoshiaki Kanamori, Kohei Morishita, Daiki Ishi, Aoto Fukushima, Ayata Inagaki, Yoko Ueda, Hiromi Morishita, Yukine Tsuji, Runa Sekiguchi, Takatoshi Murakawa, Kazuma Yamaguchi, Rei Ishikawa, Daiki Morimoto, Yudai Yamada, Shota Hirai, Yuki Nobuhara, Yownin Albert M. Leung, Yamato Itoigawa, Ryo Onodera, Satoru Kotaki, Shotaro Nakamura, Ayumi Kiuchi, Takuya Matsumoto, Midori Hirota, Kazuto Kashiwakura

    Journal of Astronomical Telescopes, Instruments, and Systems   9 ( 03 )   2023.9

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    Publishing type：Research paper (scientific journal)   Publisher：SPIE-Intl Soc Optical Eng  

    DOI： 10.1117/1.jatis.9.3.034006

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  • Assembly of an ultralight weight X-ray telescope using MEMS technologies (Conference Presentation)

    Hiromi Morishita, Yuichiro Ezoe, Kumi Ishikawa, Masaki Numazawa, Daiki Ishi, Aoto Fukushima, Ayata Inagaki, Yoko Ueda, Luna Sekiguchi, Yukine Tsuji, Takatoshi Murakawa, Kazuma Yamaguchi, Rei Ishikawa, Daiki Morimoto, Yudai Yamada, Kazuhisa Mitsuda, Kohei Morishita, Kazuo Nakajima, Yoshiaki Kanamori

    EUV and X-ray Optics: Synergy between Laboratory and Space VIII   2023.6

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.2665160

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  • Collimator of the ultra-lightweight x-ray telescope for the GEO-X mission

    Kumi Ishikawa, Takatoshi Murakawa, Daiki Ishi, Masaki Numazawa, Aoto Fukushima, Sae Sakuda, Tomoki Uchino, Ayata Inagaki, Hiromi Morishita, Yoko Ueda, Luna Sekiguchi, Yukine Tsuji, Yuichiro Ezoe

    Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray   2022.8

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.2631464

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  • Development of Bragg reflection-type x-ray polarimeter based on a bent silicon crystal using hot plastic deformation

    Yoko Ueda, Tomoki Uchino, Daiki Ishi, Yuichiro Ezoe, Kumi Ishikawa, Masaki Numazawa, Aoto Fukushima, Sae Sakuda, Ayata Inagaki, Hiromi Morishita, Luna Sekiguchi, Takatoshi Murakawa, Yukine Tsuji, Kazuhisa Mitsuda, Kohei Morishita, Kazuo Nakajima

    Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray   2022.8

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.2629635

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  • Ultra-lightweight x-ray telescope fabricated with multiple MEMS technologies for GEO-X mission

    Masaki Numazawa, Yuichiro Ezoe, Kumi Ishikawa, Daiki Ishi, Aoto Fukushima, Sae Sakuda, Tomoki Uchino, Ayata Inagaki, Hiromi Morishita, Yoko Ueda, Takatoshi Murakawa, Luna Sekiguchi, Yukine Tsuji, Ikuyuki Mitsuishi, Hiroshi Nakajima, Yoshiaki Kanamori, Kohei Morishita, Kazuhisa Mitsuda

    Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray   2022.8

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.2630501

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  • Improvement of imaging performance of silicon micropore X-ray optics by ultra long-term annealing

    Aoto Fukushima, Daiki Ishi, Yuichiro Ezoe, Kumi Ishikawa, Masaki Numazawa, Sae Sakuda, Tomoki Uchino, Ayata Inagaki, Yoko Ueda, Hiromi Morishita, Luna Sekiguchi, Takatoshi Murakawa, Yukine Tsuji, Kazuhisa Mitsuda, Yoshiaki Kanamori

    Optics Express   30 ( 14 )   25195 - 25195   2022.6

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    Publishing type：Research paper (scientific journal)   Publisher：Optica Publishing Group  

    We have been developing a light-weight X-ray telescope using micro electro mechanical systems technologies for future space missions. Micropores of 20 µm width are formed in a 4-inch Si wafer with deep reactive ion etching, and their sidewalls are used as X-ray reflection mirrors. The flatness of the sidewall is an important factor to determine the imaging performance, angular resolution. It is known that hydrogen annealing is effective to smooth a Si surface. We tested 150 hour annealing to achieve the ultimately smooth sidewalls. After 50 hour, 100 hour, and 150 hour annealing, the angular resolution improved 10.3, 4.0, and 2.6 arcmin in full width at half maximum (FWHM) and 17.0, 14.5, and 10.8 arcmin in half-power width (HPW). In spite of this improvement, the edge shapes of the sidewall were rounded. Therefore, both edges of the sidewall were ground and polished, and then the angular resolution was improved further to 3.2 arcmin (FWHM) and 5.4 arcmin (HPW).

    DOI： 10.1364/oe.459774

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  • Suzaku detection of solar wind charge exchange emission from a variety of highly ionized ions in an interplanetary coronal mass ejection

    Kazunori Asakura, Hironori Matsumoto, Koki Okazaki, Tomokage Yoneyama, Hirofumi Noda, Kiyoshi Hayashida, Hiroshi Tsunemi, Hiroshi Nakajima, Satoru Katsuda, Daiki Ishi, Yuichiro Ezoe

    Publications of the Astronomical Society of Japan   73 ( 3 )   504 - 518   2021.3

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    X-ray emission generated through solar-wind charge exchange (SWCX) is known to contaminate X-ray observation data, the amount of which is often significant or even dominant, particularly in the soft X-ray band, when the main target consists of comparatively weak diffuse sources, depending on the space weather during the observation. In particular, SWCX events caused by interplanetary coronal mass ejections (ICMEs) tend to be spectrally rich and to provide critical information about the metal abundance in the ICME plasma. We analyzed the SN1006 background data observed with Suzaku on 2005 September 11 shortly after an X6-class solar flare, signatures of which were separately detected together with an associated ICME. We found that the data include emission lines from a variety of highly ionized ions generated through SWCX. The relative abundances of the detected ions were found to be consistent with those in past ICME-driven SWCX events. Thus, we conclude that this event was ICME driven. In addition, we detected a sulfur xvi line for the first time as one from an SWCX emission, which suggests that it is the most spectrally rich SWCX event ever observed. We suggest that observations of ICME-driven SWCX events can provide a unique probe to study the population of highly ionized ions in the plasma, which is difficult to measure in currently available in situ observations.

    DOI： 10.1093/pasj/psab015

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  • Source position determination method of multiplexing lobster-eye optics

    Keisuke Uchiyama, Toru Tamagawa, Tatehiro Mihara, Yuanhui Zhou, Yuichiro Ezoe, Masaki Numazawa, Daiki Ishi, Ryota Otsubo, Aoto Fukushima, Tatsuya Yuasa, Hikaru Suzuki, Tomoki Uchino, Sae Sakuda, Kumi Ishikawa

    Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray   2020.12

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    Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

    DOI： 10.1117/12.2560427

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  • Multiplexing lobster-eye optics: a concept for wide-field x-ray monitoring

    Toru Tamagawa, Keisuke Uchiyama, Ryota Otsubo, Tatsuya Yuasa, Yuanhui Zhou, Tatehiro Mihara, Yuichiro Ezoe, Masaki Numazawa, Daiki Ishi, Aoto Fukushima, Hikaru Suzuki, Tomoki Uchino, Sae Sakuta, Kumi Ishikawa, Teruaki Enoto, Takanori Sakamoto

    Journal of Astronomical Telescopes, Instruments, and Systems   6 ( 02 )   1 - 1   2020.6

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    Publishing type：Research paper (scientific journal)   Publisher：SPIE-Intl Soc Optical Eng  

    DOI： 10.1117/1.jatis.6.2.025003

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  • Grinding and chemical mechanical polishing process for micropore x-ray optics fabricated with deep reactive ion etching

    Aoto Fukushima, Maiko Fujitani, Kumi Ishikawa, Masaki Numazawa, Daiki Ishi, Ryota Otsubo, Hikaru Nagatoshi, Hikaru Suzuki, Tatsuya Yuasa, Takaya Ohashi, Kazuhisa Mitsuda, Yuichiro Ezoe

    Applied Optics   58 ( 19 )   5240 - 5240   2019.6

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    Publishing type：Research paper (scientific journal)   Publisher：The Optical Society  

    DOI： 10.1364/ao.58.005240

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  • Development of Binary Black Hole Observation Satellite “ORBIS”

    Jun MATSUSHIMA, Hironori SAHARA, Shogo ASANO, Masahiro KAKU, Toshihiro KANDA, Mayu BANNO, Hirohisa ASANO, Yuya KOBAYASHI, Natsumi KIMURA, Norio YAMASHITA, Yuichiro EZOE, Kumi ISHIKAWA, Kasumi NAKAKAMURA, Masaki NUMAZAWA, Kazuma TAKEUCHI, Masaru TERADA, Daiki ISHII, Yusuke NODA, Maiko FUJITANI, Naoki ISOBE, Hiroshi NAKAJIMA, Norihide MIYAMURA

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN   17 ( 4 )   477 - 482   2019

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    Publishing type：Research paper (scientific journal)   Publisher：Japan Society for Aeronautical and Space Sciences  

    DOI： 10.2322/tastj.17.477

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  • Evaluation of alignment error of micropore X-ray optics caused by hot plastic deformation

    Masaki Numazawa, Daiki Ishi, Yuichiro Ezoe, Kazuma Takeuchi, Masaru Terada, Maiko Fujitani, Kumi Ishikawa, Kazuo Nakajima, Kohei Morishita, Takaya Ohashi, Kazuhisa Mitsuda, Kasumi Nakamura, Yusuke Noda

    Japanese Journal of Applied Physics   57 ( 6S1 )   06HJ11 - 06HJ11   2018.5

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    Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    DOI： 10.7567/jjap.57.06hj11

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    Other Link： http://stacks.iop.org/1347-4065/57/i=6S1/a=06HJ11?key=crossref.dd10f36ef32171895dc234de11fefed4

  • Pt thermal atomic layer deposition for silicon x-ray micropore optics

    Kazuma Takeuchi, Yuichiro Ezoe, Kumi Ishikawa, Masaki Numazawa, Masaru Terada, Daiki Ishi, Maiko Fujitani, Mark J. Sowa, Takaya Ohashi, Kazuhisa Mitsuda

    Applied Optics   57 ( 12 )   3237 - 3237   2018.4

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    Publishing type：Research paper (scientific journal)   Publisher：The Optical Society  

    DOI： 10.1364/ao.57.003237

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  • X-ray evaluation of high-verticality sidewalls fabricated by deep reactive ion etching

    Kazuma Takeuchi, Yuichiro Ezoe, Kumi Ishikawa, Kasumi Nakamura, Masaki Numazawa, Masaru Terada, Maiko Fujitani, Daiki Ishi, Yusuke Noda, Takaya Ohashi, Kohei Morishita, Kazuo Nakajima, Kazuhisa Mitsuda

    Japanese Journal of Applied Physics   56 ( 6S1 )   06GN04 - 06GN04   2017.5

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    Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    DOI： 10.7567/jjap.56.06gn04

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    Other Link： http://stacks.iop.org/1347-4065/56/i=6S1/a=06GN04?key=crossref.5b264e041fb41784456935da2d0327e1

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MISC

  • XL-Calibur気球実験搭載硬X線望遠鏡の2024年フライト後の性能調査

    倉本春希, 松本浩典, 小高裕和, 袴田知宏, 島耕平, 宮本愛子, 河村穂登, 村上海都, 内田賢佑, 高塚紗弥菜, 長尾梓生, 宮澤拓也, 石橋和紀, 伊師大貴, 前田良知, 石田学, 宮本明日香, 田中虎次郎, 内田悠介, 呉屋和保, 横田雅人, 高橋弘充, 粟木久光, 古澤彰浩, OKAJIMA Takashi, KRAWCZYNSKI Henric, KISLAT Fabian, PEARCE Mark, 上杉健太朗, 星野真人

    日本天文学会年会講演予稿集   2025   2025

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  • X線分光撮像衛星XRISM搭載Resolveの軌道上運用について

    UCHIDA Y., ISHISAKI Y., KELLEY R. L., AWAKI H., BALLEZA J. C., BARNSTABLE K. R., BIALAS T. G., BOISSAY-MALAQUIN R., BROWN G. V., CANAVAN E. R., CARNAHAN T. M., CHIAO M. P., COMBER B. J., COSTANTINI E., CUMBEE R. S., DEN HERDER J.-W., DERCKSEN J., DE VRIES C. P., DIPIRRO M. J., ECKART M. E., EZOE Y., FERRIGNO C., FUJIMOTO R., GORTER N., GRAHAM S. M., GRIM M., HARTZ L. S., HAYAKAWA R., HAYASHI T., HELL N., ICHINOHE Y., IIZUKA R., ISHI D., ISHIDA M., ISHIKAWA K., JAMES B. L., KANEMARU Y., KENYON S. J., KILBOURNE C. A., KIMBALL M. O., KITAMOTO S., LEUTENEGGER M. A., MAEDA Y., MCCAMMON D., MALAUGHLIN B. J., MIKO J. J., VAN DER MEER E., MIZUMOTO M., OKAJIMA T., OKAMOTO A., PALTANI S., PORTER F. S., REICHENTHAL L. S., SATO K., SATO T., SATO Y., SAWADA M., SHINOZAKI K., SHIPMAN R. F., SHIRRON P. J., SNEIDERMAN G. A., SOONG Y., SZYMKIEWICZ R., SZYMKOWIAK A. E., TAKEI Y., TAKEO M., TAMURA K., TSUJIMOTO M., WASSERZUG S., WITTHOEFT M. C., WOLFS R., YAMADA S., YAMASAKI N., YASUDA S.

    日本天文学会年会講演予稿集   2024   2024

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  • 硬X線集光偏光計XL-Calibur気球実験の2024年フライトの準備状況

    高橋弘充, 阪本菜月, 今澤遼, 眞武寛人, 水野恒史, 深沢泰司, 青柳美緒, 袴田知宏, 石渡幸太, 鴨川航, 倉本春希, 島耕平, 白濱健太郎, 善本真梨那, 松本浩典, 常深博, 田中虎次郎, 松本岳人, 宮本明日香, 伊師大貴, 石田学, 前田良知, 斎藤芳隆, 内田和海, 石橋和紀, 内田悠介, 宮澤拓也, 今村竜太, 粟木久光, 武尾舞, 古澤彰浩, 郡司修一, 榎戸輝揚, 北口貴雄, 玉川徹, 岡島崇, 田村啓輔, 林多佳由, KRAWCZYNSKI Henric, KISLAT Fabian

    日本天文学会年会講演予稿集   2024   2024

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  • XRISM/Xtend observation of the intense space storm in 2024 May

    小林翔悟, 福島光太郎, 伊師大貴, 山崎典子, 佐藤浩介

    地球電磁気・地球惑星圏学会総会及び講演会(Web)   156th   2024

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  • Status of GEO-X mission

    江副祐一郎, 船瀬龍, 船瀬龍, 永田晴紀, 三好由純, 中嶋大, 三石郁之, 石川久美, 沼澤正樹, 佐藤佑樹, 川端洋輔, 布施綾太, 中島晋太郎, BODEN Ralf, KAMPS Landon, 信原佑樹, 平井翔太, 米山友景, 萩野浩一, 松本洋介, 細川敬祐, 笠原慧, 伊師大貴, 平賀純子, 満田和久, 藤本正樹, 上野宗孝, 山崎敦, 長谷川洋, 三谷烈史, 川勝康弘, 岩田隆浩

    地球電磁気・地球惑星圏学会総会及び講演会(Web)   156th   2024

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  • XRISM/Xtend Observations of Solar Wind Charge Exchange X-ray Emission from the Earth’s Magnetosphere Associated with Space Storms

    伊師大貴

    地球電磁気・地球惑星圏学会総会及び講演会(Web)   156th   2024

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  • In-orbit status of the soft X-ray imaging telescope “Xtend” for X-Ray Imaging and Spectroscopy Mission “XRISM” (II)

    村上弘志, 小林翔悟, 森浩二, 中嶋大, 冨田洋, 岡島崇, 野田博文, 内田裕之, 鈴木寛大, 萩野浩一, 信川久実子, 米山友景, 田中孝明, 信川正順, 内山秀樹, 松本浩典, 鶴剛, 山内誠, 廿日出勇, 小高裕和, 幸村孝由, 山岡和貴, 石田学, 前田良知, 林多佳由, 田村啓輔, BOISSAY-MALAQUIN R., 佐藤寿紀, 吉田鉄生, 金丸善朗, 伊師大貴, 水野恒史, 平賀純子, 堂谷忠靖, 尾崎正伸, 常深博, 東竜一, 亀井貴光, 福田将大, 早川海都, 善本真梨那, 袴田知宏, 青柳美緒, 島耕平, 井上峻, 青木悠馬, 伊藤耶馬斗, 青木大輝, 二之湯開登, 清水康行, 樋口茉由, 大塚芳徳, 横須晴彦, 米丸若菜, 市川雄大, 中野瑛子, 岳本廉央, 松島司, 浦瀬怜香, 倉嶋順, 淵琴美, 林田清

    日本物理学会講演概要集(CD-ROM)   79 ( 2 )   2024

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  • Verification of X-ray imaging with a bent silicon crystal Bragg reflection type X-ray polarimeter using hot plastic deformation

    石牟礼碧衣, 伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 森下弘海, 石川怜, 森本大輝, 山田裕大, 宮内俊英, 小笠原勇翔, 世良直也, 中川悠, 福島優, 満田和久, 森下浩平, 中嶋一雄

    日本物理学会講演概要集(CD-ROM)   79 ( 2 )   2024

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  • Telescope mounting for the 2024 flight of the hard X-ray polarimetry balloon-borne mission XL-Calibur

    倉本春希, 松本浩典, 善本真梨那, 袴田知宏, 島耕平, 白濱健太郎, 村上海都, 常深博, 高橋弘充, 阪本菜月, 今澤遼, 眞武寛人, 水野恒史, 深沢泰司, 前田良知, 石田学, 伊師大貴, 斎藤芳隆, 内田和海, 田中虎次郎, 松本岳人, 宮本明日香, 石橋和紀, 内田悠介, 宮澤拓也, 今村竜太, 粟木久光, 武尾舞, 古澤彰浩, 郡司修一, 榎戸輝揚, 北口貴雄, 玉川徹, OKAJIMA Takashi, 田村啓輔, 林多佳由, KRAWCZYNSKI Henric, KISLAT Fabian

    日本物理学会講演概要集(CD-ROM)   79 ( 2 )   2024

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  • X線分光撮像衛星XRISMに搭載された軟X線撮像検出器SXIの軌道上エネルギー較正

    中野瑛子, 岳本廉央, 大塚芳徳, 横須晴彦, 米丸若菜, 市川雄大, 松島司, 森浩二, 青木悠馬, 伊藤耶馬斗, 信川久実子, 信川正順, 善本真梨那, 袴田知宏, 青柳美緒, 島耕平, 小高裕和, 松本浩典, 中嶋大, 村上弘志, 内田裕之, 鶴剛, 田中孝明, 米山友景, 冨田洋, 鈴木寛大, 吉田鉄生, 金丸善朗, 伊師大貴, 水野恒史, 萩野浩一, 野田博文, 内山秀樹, 山内誠, 廿日出勇, 樋口茉由, 幸村孝由, 小林翔悟, 山岡和貴, 堂谷忠靖, 尾崎正伸, 常深博

    日本天文学会年会講演予稿集   2024   2024

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  • 軽量・小型X線撮像分光装置を用いた月面蛍光X線探査の検討

    戸井田愛理, 江副祐一郎, 伊師大貴, 沼澤正樹, 石川久美

    日本惑星科学会秋季講演会予稿集(Web)   2024   2024

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  • X線分光撮像衛星XRISM搭載Resolveの開発の現状 XII

    ISHISAKI Y., ISHISAKI Y., KELLEY R.L., AWAKI H., BALLEZA J.C., BARNSTABLE K.R., BIALAS T.G., BOISSAY-MALAQUIN R., BROWN G.V., CANAVAN E.R., CARNAHAN T.M., CHIAO M.P., COMBER B.J., COSTANTINI E., CUMBEE R.S., DEN HERDER J.-W., DERCKSEN J., DE VRIES C.P., DIPIRRO M.J., ECKART M.E., EZOE Y., FERRIGNO C., FUJIMOTO R., GORTER N., GRAHAM S.M., GRIM M., HARTZ L.S., HAYAKAWA R., HAYASHI T., HELL N., HOSHINO A., ICHINOHE Y., ISHI D., ISHIDA M., ISHIKAWA K., JAMES B.L., KANEMARU Y., KENYON S.J., KILBOURNE C.A., KIMBALL M.O., KITAMOTO S., LEUTENEGGER M.A., MAEDA Y., MCCAMMON D., MALAUGHLIN B.J., MIKO J.J., VAN DER MEER E., MIZUMOTO M., OKAJIMA T., OKAMOTO A., PALTANI S., PORTER F.S., REICHENTHAL L.S., SATO K., SATO T., SATO Y., SAWADA M., SHINOZAKI K., SHIPMAN R.F., SHIRRON P.J., SNEIDERMAN G.A., SOONG Y., SZYMKIEWICZ R., SZYMKOWIAK A.E., TAKEI Y., TAKEO M., TAMBA T., TAMURA K., TSUJIMOTO M., UCHIDA Y., WASSERZUG S., WITTHOEFT M.C., WOLFS R., YAMADA S., YASUDA S.

    日本天文学会年会講演予稿集   2024   2024

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  • 硬X線偏光検出気球実験XL-Caliburの2024年フライトに向けた準備

    倉本春希, 松本浩典, 鴨川航, 善本真梨那, 袴田知宏, 青柳美緒, 石渡幸太, 島耕平, 白濱健太郎, 野田博文, 林田清, 常深博, 宮澤拓也, 石橋和紀, 伊師大貴, 前田良知, 石田学, 宮本明日香, 松本岳人, 田中虎次郎, 武尾舞, 内田悠介, 今澤遼, 阪本菜月, 高橋弘充, 今村竜太, 粟木久光, 古澤彰浩, 岡島崇, 田村啓輔, 林多佳由, KRAWCZYNSKI Henric, KISLAT Fabian

    日本天文学会年会講演予稿集   2024   2024

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  • 地球磁気圏X線撮像衛星GEO-Xの現状

    江副祐一郎, 船瀬龍, 船瀬龍, 永田晴紀, 三好由純, 中嶋大, 三石郁之, 布施綾太, 川端洋輔, BODEN Ralf C., 中島晋太郎, KAMPS Landon, 信原佑樹, 平井翔太, 石川久美, 沼澤正樹, 佐藤佑樹, 萩野浩一, 松本洋介, 細川敬祐, 伊師大貴, 米山友景, 上野宗孝, 山崎敦, 長谷川洋, 三田信, 三谷烈史, 藤本正樹, 川勝康弘, 岩田隆浩, 満田和久, 平賀純子, 笠原慧, 小泉宏之, 佐原宏典, 金森義明, 森下浩平

    日本天文学会年会講演予稿集   2024   2024

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  • X線天文衛星「すざく」を用いたTuttle彗星コマの化学組成の制約

    森本大輝, 江副祐一郎, 石川久美, 沼澤正樹, 関口るな, 伊師大貴

    日本天文学会年会講演予稿集   2024   2024

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  • 像再構成型X線光学系に用いるKirkpatrick-Baez(KB)ミラーの開発(2)

    松本岳人, 田中虎次郎, 宮本明日香, 長谷川拓斗, 前田良知, 石田学, 伊師大貴

    日本天文学会年会講演予稿集   2024   2024

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  • MEMS技術を用いた広視野X線望遠鏡Lobster Eye光学系の開発

    石川怜, 江副祐一郎, 石川久美, 沼澤正樹, 山田裕大, 宮内俊英, 伊師大貴

    日本天文学会年会講演予稿集   2024   2024

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  • Observations of the neutral gas contribution of Comet 73P/SW with Suzaku

    関口るな, 江副祐一郎, 石川久美, 沼澤正樹, 伊師大貴, 森本大輝

    日本物理学会講演概要集(CD-ROM)   79 ( 1 )   2024

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  • 地球磁気圏X線撮像計画GEO-X(GEOspace X-ray imager)の現状 VII

    沼澤正樹, 江副祐一郎, 船瀬龍, 船瀬龍, 永田晴紀, 三好由純, 中嶋大, 三石郁之, 布施綾太, 川端洋輔, BODEN Ralf C., 中島晋太郎, KAMPS Landon, 信原佑樹, 平井翔大, 石川久美, 佐藤佑樹, 萩野浩一, 松本洋介, 細川敬祐, 伊師大貴, 上野宗孝, 山崎敦, 長谷川洋, 三田信, 三谷烈史, 藤本正樹, 川勝康弘, 岩田隆浩, 米山友景, 満田和久, 平賀純子, 笠原慧, 小泉宏之, 佐原宏典, 金森義明, 森下浩平

    日本天文学会年会講演予稿集   2024   2024

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  • X線分光撮像衛星(XRISM)搭載軟X線撮像装置(Xtend)の軌道上運用(2)

    小林翔悟, 村上弘志, 森浩二, 中嶋大, 冨田洋, 岡島崇, 野田博文, 内田裕之, 鈴木寛大, 萩野浩一, 信川久実子, 米山友景, 田中孝明, 信川正順, 内山秀樹, 松本浩典, 鶴剛, 山内誠, 廿日出勇, 小高裕和, 幸村孝由, 山岡和貴, 石田学, 前田良知, 林多佳由, 田村啓輔, BOISSAY-MALAQUIN R., 佐藤寿紀, 吉田鉄生, 金丸善朗, 伊師大貴, 水野恒史, 平賀純子, 堂谷忠靖, 尾崎正伸, 常深博, 東竜一, 朝比奈遥, 中村彰太郎, 亀井貴光, 福田将大, 善本真梨那, 袴田知宏, 青柳美緒, 島耕平, 井上峻, 青木悠馬, 伊藤耶馬斗, 青木大輝, 二之湯開登, 清水康行, 樋口茉由, 大塚芳徳, 横須晴彦, 米丸若菜, 市川雄大, 中野瑛子, 岳本廉央, 松島司, 浦瀬怜香, 倉嶋順, 淵琴美, 林田清

    日本天文学会年会講演予稿集   2024   2024

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  • 像再構成型X線光学系に用いるKirkpatrick-Baez(KB)ミラーの開発

    松本岳人, 宮本明日香, 田中虎次郎, 長谷川拓斗, 前田良知, 石田学, 伊師大貴

    日本天文学会年会講演予稿集   2023   2023

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  • X線分光撮像衛星XRISM搭載Resolveの開発の現状 XI

    SATO K., ISHISAKI Y., ISHISAKI Y., KELLEY R.L., AWAKI H., BALLEZA J.C., BARNSTABLE K.R., BIALAS T.G., BOISSAY-MALAQUIN R., BROWN G.V., CANAVAN E.R., CUMBEE R.S., CARNAHAN T.M., CHIAO M.P., COMBER B.J., COSTANTINI E., DEN HERDER J.-W., DERCKSEN J., DE VRIES C., DIPIRRO M.J., ECKART M., EZOE Y., FERRIGNO C., FUJIMOTO R., GORTER N., GRAHAM S.M., GRIM M., HARTZ L.S., HAYAKAWA R., HAYASHI T., HELL N., HOSHINO A., ICHINOHE Y., ISHI D., ISHIDA M., ISHIKAWA K., JAMES B.L., KANEMARU Y., KENYON S.J., KILBOURNE C.A., KIMBALL M.O., KITAMOTO S., LEUTENEGGER M., MAEDA Y., MCCAMMON D., MCLAUGHLIN B.J., MIKO J.J., VAN DER MEER E., MIZUMOTO M., OKAJIMA T., OKAMOTO A., PALTANI S., PORTER F.S., REICHENTHAL L.S., SATO T., SAWADA M., SHINOZAKI K., SHIPMAN R., SHIRRON P.J., SNEIDERMAN G.A., SOONG Y., SZYMKIEWICZ R., SZYMKOWIAK A.E., TAKEI Y., TAKEO M., TAMBA T., TAMURA K., TSUJIMOTO M., UCHIDA Y., WASSERZUG S., WITTHOEFT M.C., WOLF R., YAMADA S., YASUDA S.

    日本天文学会年会講演予稿集   2023   2023

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  • 原子層堆積法を用いたCo成膜Si光学系の開発

    辻雪音, 伊師大貴, 福島碧都, 江副祐一郎, 石川久美, 沼澤正樹, 稲垣綾太, 上田陽功, 森下拓海, 関口るな, 村川貴俊, 山口和馬, 石川怜, 森本大輝, 山田裕大, 満田和久

    日本天文学会年会講演予稿集   2023   2023

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  • 超軽量X線望遠鏡への原子層堆積法によるCo成膜の研究

    辻雪音, 伊師大貴, 福島碧都, 江副祐一郎, 石川久美, 沼澤正樹, 稲垣綾太, 上田陽功, 森下弘海, 関口るな, 村川貴俊, 山口和馬, 石川怜, 森本大輝, 山田裕大, 満田和久

    化学工学会年会研究発表講演要旨集(CD-ROM)   88th   2023

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  • Modeling of charge exchange X-ray emission associated with the Earth’s magnetosphere

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    地球電磁気・地球惑星圏学会総会及び講演会(Web)   154th   2023

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  • Status of GEO-X mission

    江副祐一郎, 三好由純, 沼澤正樹, 松本洋介, 細川敬祐, 笠原慧, 伊師大貴, 山崎敦, 三谷烈史

    地球電磁気・地球惑星圏学会総会及び講演会(Web)   154th   2023

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  • 地球磁気圏に付随した電荷交換X線放射の時空間変動モデル構築

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    日本天文学会年会講演予稿集   2023   2023

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  • GEO-X衛星に向けた迷光防止用コリメータの開発

    村川貴俊, 石川久美, 沼澤正樹, 江副祐一郎, 伊師大貴, 福島碧都, 稲垣綾太, 上田陽功, 森下拓海, 辻雪音, 関口るな, 山口和馬, 石川怜, 森本大貴, 山田裕大, 満田和久

    日本天文学会年会講演予稿集   2023   2023

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  • Development of an ultra-lightweight X-ray telescope using MEMS technology

    森下弘海, 江副祐一郎, 石川久美, 沼澤正樹, 伊師大貴, 福島碧都, 内野友樹, 作田紗恵, 稲垣綾太, 上田陽功, 関口るな, 辻雪音, 村川貴俊, 満田和久, 森下浩平, 中嶋一雄, 金森義明

    日本地球惑星科学連合大会予稿集(Web)   2022   2022

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  • X線反射率向上を目指した原子層堆積法による軽元素膜付け

    石川久美, 伊師大貴, 江副祐一郎, 沼澤正樹, 福島碧都, 内野友樹, 作田紗恵, 稲垣綾太, 上田陽功, 森下弘海, 関口るな, 辻雪音, 村川貴俊, 満田和久

    日本天文学会年会講演予稿集   2022   2022

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  • X線天文衛星「すざく」で観測した彗星におけるコマの中性気体組成分析

    関口るな, 江副祐一郎, 石川久美, 沼澤正樹, 伊師大貴

    日本天文学会年会講演予稿集   2022   2022

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  • 微細加工技術を用いた軽量ロブスターアイ光学系の開発

    石川久美, 伊師大貴, 福島碧都, 稲垣綾太, 上田陽功, 森下弘海, 関口るな, 辻雪音, 村川貴俊, 山口和馬, 石川怜, 森本大輝, 山田裕太, 沼澤正樹, 江副祐一郎, 満田和久, 金森義明, 森下浩平

    日本天文学会年会講演予稿集   2022   2022

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  • Development of Schmidt-type Lobster eye X-ray optics using MEMS technology

    作田紗恵, 江副祐一郎, 石川久美, 沼澤正樹, 伊師大貴, 福島碧都, 内野友樹, 稲垣綾太, 上田陽功, 森下弘海, 関口るな, 辻雪音, 村川貴俊, 満田和久, 金森義明, 森下浩平

    応用物理学会春季学術講演会講演予稿集(CD-ROM)   69th   2022

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  • Development of Bragg reflection-type X-ray polarimeter based on a bent silicon crystal using high-temperature plastic deformation technology

    上田陽功, 伊師大貴, 内野友樹, 江副祐一郎, 石川久美, 福島碧都, 鈴木光, 湯浅辰哉, 作田紗恵, 稲垣綾太, 廣本悠透, 沼澤正樹, 満田和久, 森下浩平, 中嶋一雄

    応用物理学会春季学術講演会講演予稿集(CD-ROM)   68th   2021

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  • Development of X-ray polarimeter based on Bragg reflection from a bent silicon crystal prepared by hot plastic deformation technique

    伊師大貴, 内野友樹, 江副祐一郎, 石川久美, 福島碧都, 鈴木光, 湯浅辰哉, 作田紗恵, 稲垣綾太, 上田陽功, 廣本悠透, 沼澤正樹, 満田和久, 森下浩平, 中嶋一雄

    日本物理学会講演概要集(CD-ROM)   76 ( 1 )   2021

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  • 広視野を少数の撮像素子でカバーする多重化ロブスターアイX線光学系

    内山慶祐, 内山慶祐, 玉川徹, 三原建弘, 榎戸輝揚, 沼澤正樹, 周圓輝, 周圓輝, 江副祐一郎, 伊師大貴, 福島碧都, 内野友樹, 作田紗恵, 石川久美, 森下弘海, 関口るな, 辻雪音, 村川貴俊, 稲垣綾太, 上田陽功, 坂本貴紀

    日本天文学会年会講演予稿集   2021   2021

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  • 次世代X線偏光観測衛星を目指した高温塑性変形Si湾曲ブラッグ反射光学系のミッション検討

    内野友樹, 伊師大貴, 廣本悠透, 江副祐一郎, 石川久美, 福島碧都, 作田紗恵, 稲垣綾太, 上田陽功, 森下弘海, 関口るな, 辻雪音, 村川貴俊, 沼澤正樹, 満田和久, 森下浩平, 中嶋一雄

    日本天文学会年会講演予稿集   2021   2021

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  • Simultaneous Suzaku and XMM-Newton observations of solar-wind charge-exchange X-ray emission from the Earth’s magnetosphere

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    地球電磁気・地球惑星圏学会総会及び講演会(Web)   150th   2021

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  • Evaluation of X-ray reflectivity of Co-coated Si optics prepared by atomic layer deposition

    福島碧都, 伊師大貴, 江副祐一郎, 石川久美, 内野友樹, 作田紗恵, 稲垣綾太, 上田陽功, 森下弘海, 関口るな, 辻雪音, 村川貴俊, 沼澤正樹, 満田和久

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)   82nd   2021

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  • Development of Schmidt type Lobster eye optics using MEMS technology

    作田紗恵, 江副祐一郎, 石川久美, 沼澤正樹, 伊師大貴, 福島碧都, 内野友樹, 稲垣綾太, 上田陽功, 森下弘海, 関口るな, 辻雪音, 村川貴俊, 満田和久, 金森義明, 森下浩平

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)   82nd   2021

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  • 高温塑性変形技術を用いたSi湾曲ブラッグ反射型偏光計の開発

    内野友樹, 伊師大貴, 江副祐一郎, 石川久美, 福島碧都, 鈴木光, 湯浅辰哉, 作田紗恵, 稲垣綾太, 上田陽功, 廣本悠透, 沼澤正樹, 満田和久, 森下浩平, 中嶋一雄

    日本天文学会年会講演予稿集   2021   2021

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  • 「すざく」とXMM-Newton衛星の多点同時観測で探る地球周辺の太陽風電荷交換X線の空間分布

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    日本天文学会年会講演予稿集   2021   2021

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  • ALD技術を取り入れた全反射鏡の開発およびX線反射率測定による性能評価

    武尾舞, 中庭望, 江副祐一郎, 石川久美, 伊師大貴, 石田學, 前田良知, 沼澤正樹

    日本天文学会年会講演予稿集   2021   2021

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  • Pt-coated light-weight X-ray optics prepared by plasma atomic layer deposition on-board GEOspace X-ray imager (GEO-X)

    伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 福島碧都, 鈴木光, 湯浅辰哉, 内野友樹, 作田紗恵, 稲垣綾太, 上田陽功, 廣本悠透, 満田和久

    地球電磁気・地球惑星圏学会総会及び講演会(Web)   148th   2020

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  • 「すざく」とXMM-Newton衛星で同時検出した地球周辺の電荷交換X線発光

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    日本天文学会年会講演予稿集   2020   2020

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  • すざく衛星の観測による太陽風電荷交換反応由来のSXVI輝線の発見

    朝倉一統, 松本浩典, 岡崎貴樹, 米山友景, 野田博文, 林田清, 常深博, 伊師大貴, 江副祐一郎, 中嶋大, 勝田哲

    日本天文学会年会講演予稿集   2020   2020

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  • X線天文衛星「すざく」で観測した彗星における電荷交換反応モデルの検証

    鈴木光, 江副祐一郎, 沼澤正樹, 伊師大貴, 石川久美

    日本天文学会年会講演予稿集   2020   2020

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  • Development of MEMS Lobster eye optics for wide-field X-ray monitor

    湯浅辰哉, 江副祐一郎, 石川久美, 沼澤正樹, 伊師大貴, 福島碧都, 鈴木光, 内野友樹, 作田紗恵, 稲垣綾太, 上田陽功, 廣本悠透, 満田和久

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)   81st   2020

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  • Application of atomic layer deposition to astronomical X-ray telescopes

    福島碧都, 伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 大坪亮太, 鈴木光, 湯浅辰哉, 内野友樹, 作田紗恵, 満田和久

    応用物理学会春季学術講演会講演予稿集(CD-ROM)   67th   2020

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  • X線天文衛星「すざく」を用いた地球磁気圏における電荷交換X線発光イベントの系統解析

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    地球電磁気・地球惑星圏学会総会及び講演会(Web)   146th   2019

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  • MEMS技術を用いた超軽量X線望遠鏡のALDによるPt膜付加工

    伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 大坪亮太, 福島碧都, 鈴木光, 湯浅辰哉, 内野友樹, 作田紗恵, 満田和久, SOWA M. J.

    日本天文学会年会講演予稿集   2019   2019

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  • プラズマ原子層堆積法を用いたX線光学系のPt膜付け加工

    福島碧都, 伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 大坪亮太, 鈴木光, 湯浅辰哉, 内野友樹, 作田紗恵, 満田和久, SOWA M. J.

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)   80th   2019

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  • 化学機械研磨を用いたMEMSX線光学系の鏡形状改善

    福島碧都, 藤谷麻衣子, 石川久美, 沼澤正樹, 伊師大貴, 大坪亮太, 鈴木光, 永利光, 湯浅辰哉, 大橋隆哉, 満田和久, 江副祐一郎

    応用物理学会春季学術講演会講演予稿集(CD-ROM)   66th   2019

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  • 超長時間アニール後のSi微細穴X線光学系の鏡形状評価

    伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 藤谷麻衣子, 大坪亮太, 福島碧都, 鈴木光, 永利光, 湯浅辰哉, 金森義明, 大橋隆哉, 満田和久

    応用物理学会春季学術講演会講演予稿集(CD-ROM)   66th   2019

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  • Geospace Imaging via the soft X-ray imager: GEO-X mission

    MIYOSHI Yoshizumi, EZOE Yuichiro, KASAHARA Satoshi, MATSUMOTO Yosuke, ISHIKAWA Kumi, KATAOKA Ryuho, ITO Hiroki, ISHI Daiki, NUMAZAWA Masaki, YAMAZAKI Atsushi, HASEGAWA Hiroshi, FUJIMOTO Masaki, MITSUDA Kazuhisa

    日本地球惑星科学連合大会予稿集(Web)   2019   2019

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  • Development of a miniaturized X-ray imager for GEOspace X-ray imager (GEO-X)

    ISHIKAWA Kumi, EZOE Yuichiro, NUMAZAWA Masaki, ISHI Daiki, FUJITANI Maiko, OTSUBO Ryota, FUKUSHIMA Aoto, SUZUKI Hikari, YUASA Tatsuya, NAKAJIMA Hiroshi, HIRAGA Junko, MIYOSHI Yoshizumi, KASAHARA Satoshi, MITSUDA Kazuhisa

    日本地球惑星科学連合大会予稿集(Web)   2019   2019

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  • 化学機械研磨によるMEMS X線光学系の反射率の改善

    藤谷麻衣子, 江副祐一郎, 石川久美, 福島碧都, 沼澤正樹, 伊師大貴, 大坪亮太, 鈴木光, 永利光, 湯浅辰哉, 大橋隆哉, 満田和久

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)   79th   2018

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  • コロナ質量放出から時間遅延した地球周辺の電荷交換X線イベントの検出

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    日本天文学会年会講演予稿集   2018   2018

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  • 原子層堆積法によるシリコンX線微細孔工学系のPt膜付け加工

    武内数馬, 江副祐一郎, 石川久美, 沼澤正樹, 寺田優, 伊師大貴, 藤谷麻衣子, 糸山隆仁, 大坪亮太, 福島碧都, SOWA M.J., 大橋隆哉, 満田和久

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)   78th   2017

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  • 「すざく」衛星による地球周辺からの太陽風電荷交換X線イベントの系統探査

    伊師大貴, 石川久美, 江副祐一郎, 大橋隆哉

    日本天文学会年会講演予稿集   2017   2017

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  • 「すざく」衛星によるコロナ質量放出に伴う地球外圏からの広がったX線放射の観測

    伊師大貴, 石川久美, 江副祐一郎, 大橋隆哉

    地球電磁気・地球惑星圏学会総会及び講演会(Web)   142nd   2017

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  • 月付近からの地球磁気圏X線撮像計画GEO-X

    江副祐一郎, 三好由純, 笠原慧, 石川久美, 木村智樹, 藤本正樹, 川勝康弘, 岩田隆浩, 山崎敦, 長谷川洋, 沼澤正樹, 武内数馬, 伊師大貴, 大橋隆哉

    地球電磁気・地球惑星圏学会総会及び講演会(Web)   142nd   2017

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  • MEMS X線光学系の表面形状測定による鏡配置精度の評価

    寺田優, 沼澤正樹, 江副祐一郎, 武内数馬, 伊師大貴, 藤谷麻衣子, 大橋隆哉, 石川久美, 満田和久, 森下浩平

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)   78th   2017

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  • 超軽量X線光学系の表面粗さ改善に向けた長時間アニール

    伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 武内数馬, 寺田優, 藤谷麻衣子, 糸山隆仁, 大坪亮太, 福島碧斗, 大橋隆哉, 金森義明, 満田和久

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)   78th   2017

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  • シリコンドライエッチングを用いた4インチX線光学系開発の現状

    中村果澄, 江副祐一郎, 石川久美, 沼澤正樹, 武内数馬, 寺田優, 伊師大貴, 藤谷麻衣子, 野田悠祐, 大橋隆哉, 満田和久

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)   77th   2016

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Presentations

  • 湾曲 Si 結晶レンズの宇宙X線偏光 · 分光観測への応用

    伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 森本大輝, 石牟礼碧衣, 宮内俊英, 小笠原勇翔, 世良直也, 福島優, 満田和久, 森下浩平, 中嶋一雄

    第73回 応用物理学会春季学術講演会 

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    Event date： 2026.3 　 　

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • シリコン高温塑性変形技術を用いた湾曲ブラッグ結晶による宇宙X線偏光・分光計の開発

    伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 森下弘海, 森本大輝, 石牟礼碧衣, 宮内俊英, 小笠原勇翔, 世良直也, 福島優, 満田和久, 森本浩平, 中嶋一雄

    日本光学会年次学術講演会 Optics & Photonics Japan 2025 

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    Event date： 2025.12 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • A systematic search for geocoronal solar wind charge exchange events with XRISM/Xtend

    Daiki Ishi

    CX science and future missions 

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    Event date： 2025.10 　 　

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Suzaku study of SWCX events

    Daiki Ishi, Kumi Ishikawa

    CX science and future missions 

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    Event date： 2025.10 　 　

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • A systematic search for geocoronal solar wind charge exchange events with XRISM/Xtend

    Daiki Ishi, Kosuke Sato, Liyi Gu, Renata Cumbee, Yuichiro Ezoe, Adam Foster, Kotaro Fukushima, Manabu Ishida, Kumi Ishikawa, Satoru Katsuda, Yoshiaki Kanemaru, Caroline Kilbourne, Shogo Kobayashi, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Eric D. Miller, Koji Mori, Hiroshi Murakami, Hiroshi Nakajima, Hirofumi Noda, Robert Petre, Frederick S. Porter, Hiromasa Suzuki, Yukikatsu Terada, Yuusuke Uchida, Noriko Yamasaki, Mihoko Yukita, Daijiro Kanno, Marie Kondo, Jun Kurashima, Masaki Numazawa, Yuta Tsuchihashi

    XRISM International Conference 2025 

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    Event date： 2025.10 　 　

    Language：English   Presentation type：Oral presentation (general)  

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  • Modeling Soft X-ray Emission from Solar Wind Charge Exchange in Geospace Observed by Suzaku

    Daiki Ishi, Kumi Ishikawa, Yuichiro Ezoe, Yoshizumi Miyoshi, Naoki Terada

    XRISM International Conference 2025 

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    Event date： 2025.10 　 　

    Language：English   Presentation type：Poster presentation  

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  • JAXA 宇宙科学研究所 30 m X線ビームラインにおける大口径拡散ビーム照射システムの構築

    伊師 大貴, 前田 良知, 石田 學, 宮本 明日香, 松村 温斗, 内野 翔

    日本天文学会 2025 年秋季年会 

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    Event date： 2025.9 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 高温塑性変形技術を用いた湾曲 Si ブラッグ結晶によるX線偏光撮像分光の実証

    伊師大貴, 石牟礼碧衣, 江副祐一郎, 石川久美, 沼澤正樹, 森下弘海, 森本大輝, 宮内 俊英, 小笠原 勇翔, 世良 直也, 福島 優, 満田 和久, 森下 浩平, 中嶋 一雄

    第86回 応用物理学会秋季学術講演会 

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    Event date： 2025.9 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 原子層堆積技術を用いた薄膜積層による軽量・大面積X線望遠鏡の開発

    伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 森下弘海, 森本大輝, 石牟礼碧衣, 小笠原勇翔, 宮内俊英, 世良直也, 福島優, 安原重雄

    第25回 宇宙科学シンポジウム 

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    Event date： 2025.7 - 2025.8

    Language：Japanese   Presentation type：Poster presentation  

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  • Bragg reflection X-ray polarimeter based on a bent silicon crystal using hot plastic deformation

    Daiki Ishi, Aoi Ishimure, Yuichiro Ezoe, Kumi Ishikawa, Masaki Numazawa, Hiromi Morishita, Rei Ishikawa, Daiki Morimoto, Yudai Yamada, Shunei Miyauchi, Yuto Ogasawara, Naoya Sera, Haruka Nakagawa, Yu Fukushima, Kazuhisa Mitsuda, Kohei Morishita, Kazuo Nakajima

    10th International Conference on X-ray Optics and Applications 

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    Event date： 2025.4 　 　

    Language：English   Presentation type：Oral presentation (general)  

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  • Si 高温塑性変形技術を用いた湾曲ブラッグ反射型偏光計の結像実証

    伊師大貴, 石牟礼碧衣, 江副祐一郎, 石川久美, 沼澤正樹, 森下弘海, 石川怜, 森本大輝, 山田裕大, 宮内俊英, 小笠原勇翔, 世良直也, 中川悠, 福島優, 満田和久, 森下浩平, 中嶋一雄

    日本天文学会 2025 年春季年会 

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    Event date： 2025.3 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • XRISM/Xtend Observations of Solar Wind Charge Exchange X-ray Emission from the Earth's Magnetosphere Associated with Space Storms

    Daiki Ishi

    SGEPSS 2024 Fall meeting 

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    Event date： 2024.11 　 　

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • Solar activity and SWCX

    Daiki Ishi

    XRISM Science Team Meeting #6 

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    Event date： 2024.9 　 　

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • Modeling of Time-Variable Solar Wind Charge Exchange Emission Associated with the Earth's Magnetosphere

    Daiki Ishi, Kumi Ishikawa, Yuichiro Ezoe, Yoshizumi Miyoshi, Naoki Terada

    Charge exchange X-ray Universe 2024 

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    Event date： 2024.6 　 　

    Language：English   Presentation type：Oral presentation (general)  

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  • Estimates of magnetospheric solar wind charge exchange events detectable with GEO-X

    Daiki Ishi, Yuichiro Ezoe, Ralf Boden, Yoshizumi Miyoshi, Kumi Ishikawa, Hiroshi Nakajima, Ikuyuki Mitsuishi, Masaki Numazawa, Yuki Satoh

    Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray 

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    Event date： 2024.6 　 　

    Language：English   Presentation type：Poster presentation  

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  • 地球磁気圏に付随した電荷交換X線放射の変動予測モデリング

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    第154回 地球電磁気・地球惑星圏学会 

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    Event date： 2023.9 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Modeling of solar wind charge exchange emission from the Earth's magnetosphere and exosphere

    Daiki Ishi, Kumi Ishikawa, Yuichiro Ezoe, Yoshizumi Miyoshi, Naoki Terada

    The X-ray Universe 2023 

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    Event date： 2023.6 　 　

    Language：English   Presentation type：Oral presentation (general)  

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  • GEO-X mission and SWCX modeling

    Daiki Ishi, Yuichiro Ezoe

    SMILE SWT #21 - Consortium Meeting #15 

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    Event date： 2023.5 　 　

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • 地球磁気圏に付随した電荷交換X線放射の時空間変動モデル構築

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    日本天文学会 2023 年春季年会 

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    Event date： 2023.3 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 地球磁気圏に付随した電荷交換X線放射の観測およびモデリング研究

    伊師大貴

    第22回 高宇連研究会 博士論文発表会 

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    Event date： 2023.3 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Modeling of solar wind charge exchange X-ray emission associated with the Earth’s magnetosphere and exosphere

    Daiki Ishi, Kumi Ishikawa, Yuichiro Ezoe, Yoshizumi Miyoshi, Naoki Terada

    The 24th Symposium on Planetary Sciences 

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    Event date： 2023.2 　 　

    Language：English   Presentation type：Oral presentation (general)  

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  • すざくの成果とモデル比較

    伊師大貴

    研究会「GEO-X 計画と太陽系X線天文学に向けて」 

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    Event date： 2022.2 　 　

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • 「すざく」と XMM-Newton 衛星による地球周辺電荷交換X線の多点同時観測

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    第150回 地球電磁気・地球惑星圏学会 

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    Event date： 2021.11 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 「すざく」と XMM-Newton 衛星の多点同時観測で探る地球周辺の太陽風電荷交換X線の空間分布

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    日本天文学会 2021 年春季年会 

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    Event date： 2021.3 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • シリコン高温塑性変形技術を用いた湾曲ブラッグ反射型X線偏光計の開発

    伊師大貴, 内野友樹, 江副祐一郎, 石川久美, 福島碧都, 鈴木光, 湯浅辰哉, 作田紗恵, 稲垣綾太, 上田陽功, 廣本悠透, 沼澤正樹, 満田和久, 森下浩平, 中嶋一雄

    日本物理学会第76回年次大会 

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    Event date： 2021.3 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Geocoronal solar wind charge exchange emission simultaneously observed with Suzaku and XMM-Newton

    Daiki Ishi, Kumi Ishikawa, Yuichiro Ezoe, Yoshizumi Miyoshi, Naoki Terada

    43rd COSPAR Scientific Assembly 

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    Event date： 2021.1 - 2021.2

    Language：English   Presentation type：Oral presentation (general)  

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  • 地球磁気圏X線撮像計画 GEO-X に向けた超軽量X線望遠鏡のプラズマ原子層堆積法による Pt 膜付加工

    伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 福島碧都, 鈴木光, 湯浅辰哉, 内野友樹, 作田紗恵, 稲垣綾太, 上田陽功, 廣本悠透, 満田和久

    第148回 地球電磁気・地球惑星圏学会 

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    Event date： 2020.11 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 「すざく」と XMM-Newton 衛星で同時検出した地球周辺の電荷交換X線発光

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    日本天文学会 2020 年春季年会 

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    Event date： 2020.3 　 　

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  • Geocoronal Solar Wind Charge Exchange Events Simultaneously Detected by Suzaku and XMM-Newton

    Daiki Ishi, Kumi Ishikawa, Yuichiro Ezoe, Yoshizumi Miyoshi, Naoki Terada

    The 21st Symposium on Planetary Sciences 

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    Event date： 2020.2 　 　

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  • Metal-coated MEMS X-ray optics using atomic layer deposition

    Daiki Ishi, Yuichiro Ezoe, Masaki Numazawa, Aoto Fukushima, Ryota Otsubo, Hikaru Suzuki, Tatsuya Yuasa, Sae Sakuda, Tomoki Uchino, Kumi Ishikawa, Kazuhisa Mitsuda

    12th International Workshop on Astronomical X-Ray Optics 

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    Event date： 2019.12 　 　

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  • X線天文衛星「すざく」を用いた地球磁気圏における電荷交換X線発光イベントの系統解析

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    第146回 地球電磁気・地球惑星圏学会 

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    Event date： 2019.10 　 　

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  • MEMS 技術を用いた超軽量X線望遠鏡の ALD による Pt 膜付加工

    伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 大坪亮太, 福島碧都, 鈴木光, 湯浅辰哉, 内野友樹, 作田紗恵, 満田和久, Mark J. Sowa

    日本天文学会 2019 年秋季年会 

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    Event date： 2019.9 　 　

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  • 「すざく」衛星を用いた地球磁気圏における電荷交換X線発光の系統解析

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹

    地球磁気圏撮像観測に関する研究会 

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    Event date： 2019.9 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 超長時間アニール後の Si 微細穴X線光学系の鏡形状評価

    伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 武内数馬, 寺田優, 藤谷麻衣子, 大坪亮太, 福島碧都, 鈴木光, 永利光, 湯浅辰哉, 金森義明, 大橋隆哉, 満田和久

    第66回 応用物理学会春季学術講演会 

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    Event date： 2019.3 　 　

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  • コロナ質量放出から時間遅延した地球周辺の電荷交換X線イベントの検出

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹, 満田和久, 大橋隆哉

    日本天文学会 2018 年春季年会 

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    Event date： 2018.3 　 　

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 「すざく」衛星による地球磁気圏における太陽風電荷交換X線イベントの系統的解析

    伊師大貴, 石川久美, 江副祐一郎, 三好由純, 寺田直樹, 大橋隆哉

    第23回 CPS 月惑星探査研究会 

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    Event date： 2018.3 　 　

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  • Evaluation of arrangement error of micropore X-ray mirrors due to hot plastic deformation process

    Daiki Ishi, Masaiki Numazawa, Yuichiro Ezoe, Kazuma Takeuchi, Masaru Terada, Maiki Fujitani, Takahito Itoyama, Ryota Otsubo, Aoto Fukushima, Takaya Ohashi, Kumi Ishikawa, Kazuhisa Mitsuda, Kouhei Morishita

    30th International Microprocesses and Nanotechnology Conference 

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    Event date： 2017.11 　 　

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  • 「すざく」衛星によるコロナ質量放出に伴う地球外圏からの広がったX線放射の観測

    伊師大貴, 石川久美, 江副祐一郎, 大橋隆哉

    第142回 地球電磁気・地球惑星圏学会 

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    Event date： 2017.10 　 　

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  • 超軽量X線光学系の表面粗さ改善に向けた長時間アニール

    伊師大貴, 江副祐一郎, 石川久美, 沼澤正樹, 武内数馬, 寺田優, 藤谷麻衣子, 糸山隆仁, 大坪亮太, 福島碧都, 大橋隆哉, 金森義明, 満田和久

    第78回 応用物理学会秋季学術講演会 

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    Event date： 2017.9 　 　

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  • A Systematic Search for Solar Wind Charge Exchange Emission from the Earth’s Exosphere with Suzaku

    Daiki Ishi, Kumi Ishikawa, Yuichiro Ezoe, Takaya Ohashi, Yoshizumi Miyoshi, Naoki Terada

    The X-ray Universe 2017 

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    Event date： 2017.6 　 　

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  • 「すざく」衛星による地球周辺からの太陽風電荷交換X線イベントの系統探査

    伊師大貴, 石川久美, 江副祐一郎, 大橋隆哉

    日本天文学会 2017 年春季年会 

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    Event date： 2017.3 　 　

    Language：Japanese   Presentation type：Poster presentation  

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Awards

  • 講演奨励賞

    2026.3   応用物理学会   高温塑性変形技術を用いた湾曲 Si ブラッグ結晶によるX線偏光撮像分光の実証

  • Outstanding contribution award for young researchers

    2024.9   XRISM Project  

  • 学生発表賞（オーロラメダル）

    2021.6   地球電磁気・地球惑星圏学会   地球磁気圏X線撮像計画 GEO-X に向けた超軽量X線望遠鏡のプラズマ原子層堆積法による Pt 膜付加工

  • 学生優秀発表賞

    2021.3   日本物理学会   シリコン高温塑性変形技術を用いた湾曲ブラッグ反射型X線偏光計の開発

Research Projects

  • 超軽量X線望遠鏡を用いた地球周辺における電荷交換反応の俯瞰的な広視野撮像

    Grant number：19J20910  2019.4 - 2022.3

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費  東京都立大学

    伊師 大貴

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    Grant amount： \3100000 （ Direct Cost: \3100000 ）

    地球周辺では、太陽風に含まれる重イオンが 10 地球半径以上に広がる希薄な超高層大気から電子を奪い、電荷交換X線を生じる。本研究の目的は、この地球周辺の電荷交換X線の空間分布や時間変化を調べ、宇宙で普遍的な電荷交換反応の理解を深めつつ、太陽風に対する磁気圏の振る舞いや流出大気の分布を調べる惑星科学の新手段を開拓することである。そのために、(1) 月付近の探査衛星による世界初の地球周辺の電荷交換X線の俯瞰的・広視野撮像に向けた独自の超軽量 Wolter I型X線望遠鏡の開発と宇宙実証を行い、(2) 既存の衛星データを用いた地球周辺の電荷交換X線の時空間構造モデルを世界で初めて構築する。望遠鏡開発では、約 10 名程度の開発チームを主導し、角度分解能の向上を目指した新プロセスの構築に取り組み、鏡の平坦性による形状精度と鏡の正確な配置による配置精度の両面において改善を達成した。さらに、反射率を上げるために欠かせない原子層堆積法を用いた Pt 膜付の新たな条件出しを行い、表面粗さの改善にも成功した。同時に、将来衛星の打ち上げを模擬した音響試験を実施し、環境耐性を確かめることにも貢献した。関連する成果は投稿論文や学会発表としてまとめており、発表賞も受賞した。衛星データ解析では、地球周辺の電荷交換X線が「すざく」と XMM-Newton 衛星で同時に受かっているイベントを系統探索するという新たなアプローチを行い、既存モデルによる発光強度予測が観測よりも明らかに低いことを見出した。同様に関連する成果は学会発表を行い、投稿論文としてまとめている最中である。

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Committee Memberships

  • 2019.9 - 2021.6

    日本天文学会   キャリア支援委員会  

Academic Activities

  • Reviewer of Publications of the Astronomical Society of Japan

    Role(s)： Peer review

    Publications of the Astronomical Society of Japan 

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Media Coverage