The Astrophysical Journal Letters (Jan 2025)
XRISM Forecast for the Coma Cluster: Stormy, with a Steep Power Spectrum
- XRISM Collaboration,
- 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
Affiliations
- XRISM Collaboration
- Marc Audard
- ORCiD
- Department of Astronomy, University of Geneva , Versoix CH-1290, Switzerland
- Hisamitsu Awaki
- Department of Physics, Ehime University , Ehime 790-8577, Japan
- Ralf Ballhausen
- ORCiD
- Department of Astronomy, University of Maryland , College Park, MD 20742, USA; NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Center for Research and Exploration in Space Science and Technology , NASA / GSFC (CRESST II), Greenbelt, MD 20771, USA
- Aya Bamba
- ORCiD
- Department of Physics, University of Tokyo , Tokyo 113-0033, Japan
- Ehud Behar
- ORCiD
- Department of Physics , Technion, Technion City, Haifa 3200003, Israel
- Rozenn Boissay-Malaquin
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Center for Research and Exploration in Space Science and Technology , NASA / GSFC (CRESST II), Greenbelt, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County (UMBC), Baltimore, MD 21250, USA
- Laura Brenneman
- ORCiD
- Center for Astrophysics ∣ Harvard-Smithsonian , Cambridge, MA 02138, USA
- Gregory V. Brown
- ORCiD
- Lawrence Livermore National Laboratory , Livermore, CA 94550, USA
- Lia Corrales
- ORCiD
- Department of Astronomy, University of Michigan , Ann Arbor, MI 48109, USA
- Elisa Costantini
- ORCiD
- SRON Netherlands Institute for Space Research , Leiden, The Netherlands
- Renata Cumbee
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
- Maria Diaz Trigo
- ORCiD
- ESO , Karl-Schwarzschild-Strasse 2, 85748, Garching bei München, Germany
- Chris Done
- ORCiD
- Centre for Extragalactic Astronomy, Department of Physics, University of Durham , Durham DH1 3LE, UK
- Tadayasu Dotani
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Ken Ebisawa
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Megan E. Eckart
- ORCiD
- Lawrence Livermore National Laboratory , Livermore, CA 94550, USA
- Dominique Eckert
- ORCiD
- Department of Astronomy, University of Geneva , Versoix CH-1290, Switzerland
- Satoshi Eguchi
- ORCiD
- Department of Economics, Kumamoto Gakuen University , Kumamoto 862-8680, Japan
- Teruaki Enoto
- ORCiD
- Department of Physics, Kyoto University , Kyoto 606-8502, Japan
- Yuichiro Ezoe
- Department of Physics, Tokyo Metropolitan University , Tokyo 192-0397, Japan
- Adam Foster
- ORCiD
- Center for Astrophysics ∣ Harvard-Smithsonian , Cambridge, MA 02138, USA
- Ryuichi Fujimoto
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Yutaka Fujita
- ORCiD
- Department of Physics, Tokyo Metropolitan University , Tokyo 192-0397, Japan
- Yasushi Fukazawa
- ORCiD
- Department of Physics, Hiroshima University , Hiroshima 739-8526, Japan
- Kotaro Fukushima
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Akihiro Furuzawa
- Department of Physics, Fujita Health University , Aichi 470-1192, Japan
- Luigi Gallo
- ORCiD
- Department of Astronomy and Physics, Saint Mary’s University , Nova Scotia B3H 3C3, Canada
- Javier A. García
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; California Institute of Technology , Pasadena, CA 91125, USA
- Liyi Gu
- ORCiD
- SRON Netherlands Institute for Space Research , Leiden, The Netherlands
- Matteo Guainazzi
- ORCiD
- European Space Agency (ESA) , European Space Research and Technology Centre (ESTEC), 2200 AG Noordwijk, The Netherlands
- Kouichi Hagino
- ORCiD
- Department of Physics, University of Tokyo , Tokyo 113-0033, Japan
- Kenji Hamaguchi
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Center for Research and Exploration in Space Science and Technology , NASA / GSFC (CRESST II), Greenbelt, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County (UMBC), Baltimore, MD 21250, USA
- Isamu Hatsukade
- ORCiD
- Faculty of Engineering, University of Miyazaki , 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan
- Katsuhiro Hayashi
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Takayuki Hayashi
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Center for Research and Exploration in Space Science and Technology , NASA / GSFC (CRESST II), Greenbelt, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County (UMBC), Baltimore, MD 21250, USA
- Natalie Hell
- ORCiD
- Lawrence Livermore National Laboratory , Livermore, CA 94550, USA
- Edmund Hodges-Kluck
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
- Ann Hornschemeier
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
- Yuto Ichinohe
- ORCiD
- RIKEN Nishina Center , Saitama 351-0198, Japan
- Daiki Ishi
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Manabu Ishida
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Kumi Ishikawa
- Department of Physics, Tokyo Metropolitan University , Tokyo 192-0397, Japan
- Yoshitaka Ishisaki
- Department of Physics, Tokyo Metropolitan University , Tokyo 192-0397, Japan
- Jelle Kaastra
- ORCiD
- SRON Netherlands Institute for Space Research , Leiden, The Netherlands; Leiden Observatory, University of Leiden , P.O. Box 9513, NL-2300 RA, Leiden, The Netherlands
- Timothy Kallman
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
- Erin Kara
- ORCiD
- Kavli Institute for Astrophysics and Space Research , Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Satoru Katsuda
- ORCiD
- Department of Physics, Saitama University , Saitama 338-8570, Japan
- Yoshiaki Kanemaru
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Richard Kelley
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
- Caroline Kilbourne
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
- Shunji Kitamoto
- ORCiD
- Department of Physics, Rikkyo University , Tokyo 171-8501, Japan
- Shogo Kobayashi
- ORCiD
- Faculty of Physics, Tokyo University of Science , Tokyo 162-8601, Japan
- Takayoshi Kohmura
- Faculty of Science and Technology, Tokyo University of Science , Chiba 278-8510, Japan
- Aya Kubota
- Department of Electronic Information Systems, Shibaura Institute of Technology , Saitama 337-8570, Japan
- Maurice Leutenegger
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
- Michael Loewenstein
- ORCiD
- Department of Astronomy, University of Maryland , College Park, MD 20742, USA; NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Center for Research and Exploration in Space Science and Technology , NASA / GSFC (CRESST II), Greenbelt, MD 20771, USA
- Yoshitomo Maeda
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Maxim Markevitch
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
- Hironori Matsumoto
- Department of Earth and Space Science, Osaka University , Osaka 560-0043, Japan
- Kyoko Matsushita
- ORCiD
- Faculty of Physics, Tokyo University of Science , Tokyo 162-8601, Japan
- Dan McCammon
- ORCiD
- Department of Physics, University of Wisconsin –Madison, Madison, WI 53706, USA
- Brian McNamara
- Department of Physics & Astronomy, Waterloo Centre for Astrophysics, University of Waterloo , Waterloo, ON N2L 3G1, Canada
- François Mernier
- ORCiD
- Institut de Recherche en Astrophysique et Planétologie (IRAP) , Toulouse, France
- Eric D. Miller
- ORCiD
- Kavli Institute for Astrophysics and Space Research , Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Jon M. Miller
- ORCiD
- Department of Astronomy, University of Michigan , Ann Arbor, MI 48109, USA
- Ikuyuki Mitsuishi
- ORCiD
- Department of Physics, Nagoya University , Aichi 464-8602, Japan
- Misaki Mizumoto
- ORCiD
- Science Research Education Unit, University of Teacher Education Fukuoka , Fukuoka 811-4192, Japan
- Tsunefumi Mizuno
- ORCiD
- Hiroshima Astrophysical Science Center, Hiroshima University , Hiroshima 739-8526, Japan
- Koji Mori
- ORCiD
- Faculty of Engineering, University of Miyazaki , 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan
- Koji Mukai
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Center for Research and Exploration in Space Science and Technology , NASA / GSFC (CRESST II), Greenbelt, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County (UMBC), Baltimore, MD 21250, USA
- Hiroshi Murakami
- Department of Data Science, Tohoku Gakuin University , Miyagi 984-8588, Japan
- Richard Mushotzky
- ORCiD
- Department of Astronomy, University of Maryland , College Park, MD 20742, USA
- Hiroshi Nakajima
- ORCiD
- College of Science and Engineering, Kanto Gakuin University , Kanagawa 236-8501, Japan
- Kazuhiro Nakazawa
- ORCiD
- Department of Physics, Nagoya University , Aichi 464-8602, Japan
- Jan-Uwe Ness
- European Space Agency(ESA) , European Space Astronomy Centre (ESAC), E-28692 Madrid, Spain
- Kumiko Nobukawa
- ORCiD
- Department of Science, Faculty of Science and Engineering, KINDAI University , Osaka 577-8502, Japan
- Masayoshi Nobukawa
- ORCiD
- Department of Teacher Training and School Education, Nara University of Education , Nara 630-8528, Japan
- Hirofumi Noda
- ORCiD
- Astronomical Institute, Tohoku University , Miyagi 980-8578, Japan
- Hirokazu Odaka
- Department of Earth and Space Science, Osaka University , Osaka 560-0043, Japan
- Shoji Ogawa
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Anna Ogorzałek
- ORCiD
- Department of Astronomy, University of Maryland , College Park, MD 20742, USA; NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Center for Research and Exploration in Space Science and Technology , NASA / GSFC (CRESST II), Greenbelt, MD 20771, USA
- Takashi Okajima
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
- Naomi Ota
- ORCiD
- Department of Physics, Nara Women’s University , Nara 630-8506, Japan
- Stéphane Paltani
- ORCiD
- Department of Astronomy, University of Geneva , Versoix CH-1290, Switzerland
- Robert Petre
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
- Paul Plucinsky
- ORCiD
- Center for Astrophysics ∣ Harvard-Smithsonian , Cambridge, MA 02138, USA
- Frederick S. Porter
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
- Katja Pottschmidt
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Center for Research and Exploration in Space Science and Technology , NASA / GSFC (CRESST II), Greenbelt, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County (UMBC), Baltimore, MD 21250, USA
- Kosuke Sato
- International Center for Quantum-field Measurement Systems (KEK/QUP) , Tsukuba, Ibaraki 300-3256, Japan
- Toshiki Sato
- School of Science and Technology, Meiji University , Kanagawa, 214-8571, Japan
- Makoto Sawada
- ORCiD
- Department of Physics, Rikkyo University , Tokyo 171-8501, Japan
- Hiromi Seta
- Department of Physics, Tokyo Metropolitan University , Tokyo 192-0397, Japan
- Megumi Shidatsu
- ORCiD
- Department of Physics, Ehime University , Ehime 790-8577, Japan
- Aurora Simionescu
- ORCiD
- SRON Netherlands Institute for Space Research , Leiden, The Netherlands
- Randall Smith
- ORCiD
- Center for Astrophysics ∣ Harvard-Smithsonian , Cambridge, MA 02138, USA
- Hiromasa Suzuki
- ORCiD
- Faculty of Engineering, University of Miyazaki , 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan
- Andrew Szymkowiak
- ORCiD
- Yale Center for Astronomy and Astrophysics, Yale University , New Haven, CT 06520-8121, USA
- Hiromitsu Takahashi
- ORCiD
- Department of Physics, Hiroshima University , Hiroshima 739-8526, Japan
- Mai Takeo
- Department of Physics, Saitama University , Saitama 338-8570, Japan
- Toru Tamagawa
- ORCiD
- RIKEN Nishina Center , Saitama 351-0198, Japan
- Keisuke Tamura
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Center for Research and Exploration in Space Science and Technology , NASA / GSFC (CRESST II), Greenbelt, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County (UMBC), Baltimore, MD 21250, USA
- Takaaki Tanaka
- ORCiD
- Department of Physics, Konan University , Hyogo 658-8501, Japan
- Atsushi Tanimoto
- ORCiD
- Graduate School of Science and Engineering, Kagoshima University , Kagoshima, 890-8580, Japan
- Makoto Tashiro
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan; Department of Physics, Saitama University , Saitama 338-8570, Japan
- Yukikatsu Terada
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan; Department of Physics, Saitama University , Saitama 338-8570, Japan
- Yuichi Terashima
- ORCiD
- Department of Physics, Ehime University , Ehime 790-8577, Japan
- Yohko Tsuboi
- ORCiD
- Department of Physics, Chuo University , Tokyo 112-8551, Japan
- Masahiro Tsujimoto
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Hiroshi Tsunemi
- Department of Earth and Space Science, Osaka University , Osaka 560-0043, Japan
- Takeshi Tsuru
- ORCiD
- Department of Physics, Kyoto University , Kyoto 606-8502, Japan
- Ayşegül Tümer
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Center for Research and Exploration in Space Science and Technology , NASA / GSFC (CRESST II), Greenbelt, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County (UMBC), Baltimore, MD 21250, USA
- Hiroyuki Uchida
- ORCiD
- Department of Physics, Kyoto University , Kyoto 606-8502, Japan
- Nagomi Uchida
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Yuusuke Uchida
- ORCiD
- Faculty of Science and Technology, Tokyo University of Science , Chiba 278-8510, Japan
- Hideki Uchiyama
- ORCiD
- Faculty of Education, Shizuoka University , Shizuoka 422-8529, Japan
- Shutaro Ueda
- Kanazawa University , Kanazawa, 920-1192, Japan
- Yoshihiro Ueda
- ORCiD
- Department of Astronomy, Kyoto University , Kyoto 606-8502, Japan
- Shinichiro Uno
- Nihon Fukushi University , Shizuoka 422-8529, Japan
- Jacco Vink
- ORCiD
- SRON Netherlands Institute for Space Research , Leiden, The Netherlands; Anton Pannekoek Institute, the University of Amsterdam , Postbus 942491090 GE Amsterdam, The Netherlands
- Shin Watanabe
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Brian J. Williams
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]
- Satoshi Yamada
- ORCiD
- RIKEN Nishina Center , Saitama 351-0198, Japan
- Shinya Yamada
- ORCiD
- Department of Physics, Rikkyo University , Tokyo 171-8501, Japan
- Hiroya Yamaguchi
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Kazutaka Yamaoka
- ORCiD
- Department of Physics, Nagoya University , Aichi 464-8602, Japan
- Noriko Yamasaki
- ORCiD
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Makoto Yamauchi
- ORCiD
- Faculty of Engineering, University of Miyazaki , 1-1 Gakuen-Kibanadai-Nishi, Miyazaki, Miyazaki 889-2192, Japan
- Shigeo Yamauchi
- Department of Physics, Faculty of Science, Nara Women’s University , Nara 630-8506, Japan
- Tahir Yaqoob
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Center for Research and Exploration in Space Science and Technology , NASA / GSFC (CRESST II), Greenbelt, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County (UMBC), Baltimore, MD 21250, USA
- Tomokage Yoneyama
- Department of Physics, Chuo University , Tokyo 112-8551, Japan
- Tessei Yoshida
- Institute of Space and Astronautical Science (ISAS) , Japan Aerospace Exploration Agency (JAXA), Kanagawa 252-5210, Japan
- Mihoko Yukita
- ORCiD
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Johns Hopkins University , Baltimore, MD 21218, USA
- Irina Zhuravleva
- ORCiD
- Department of Astronomy and Astrophysics, University of Chicago , Chicago, IL 60637, USA
- Andrew Fabian
- Institute of Astronomy , Cambridge CB3 0HA, UK
- Dylan Nelson
- ORCiD
- Heidelberg University , Heidelberg, Germany
- Nobuhiro Okabe
- ORCiD
- Hiroshima University , Hiroshima 739-8526, Japan
- Annalisa Pillepich
- ORCiD
- Max-Planck-Institut für Astronomie , Heidelberg, Germany
- Cicely Potter
- ORCiD
- University of Utah , Salt Lake City, UT 84112, USA
- Manon Regamey
- University of Geneva , Geneva, Switzerland
- Kosei Sakai
- Department of Physics, Nagoya University , Aichi 464-8602, Japan
- Mona Shishido
- ORCiD
- Faculty of Science and Technology, Tokyo University of Science , Chiba 278-8510, Japan
- Nhut Truong
- NASA / Goddard Space Flight Center , Greenbelt, MD 20771, USA ; [email protected]; Center for Research and Exploration in Space Science and Technology , NASA / GSFC (CRESST II), Greenbelt, MD 20771, USA; Center for Space Sciences and Technology, University of Maryland , Baltimore County (UMBC), Baltimore, MD 21250, USA
- Daniel R. Wik
- ORCiD
- University of Utah , Salt Lake City, UT 84112, USA
- John ZuHone
- ORCiD
- Center for Astrophysics ∣ Harvard-Smithsonian , Cambridge, MA 02138, USA
- DOI
- https://doi.org/10.3847/2041-8213/add2f6
- Journal volume & issue
-
Vol. 985,
no. 1
p. L20
Abstract
The XRISM Resolve microcalorimeter array measured the velocities of hot intracluster gas at two positions in the Coma galaxy cluster: ${3}^{{\prime} }\times {3}^{{\prime} }$ squares at the center and at 6 $^{\prime} $ (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, Δ v _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.
Keywords
