XRISM/Resolve view of Abell 2319: Turbulence, sloshing, and ICM dynamics

Abstract We present results from XRISM/Resolve observations of the core of the galaxy cluster Abell 2319, focusing on its kinematic properties. The intracluster medium (ICM) exhibits temperatures of approximately 8 keV across the core, with a prominent cold front and a high-temperature region ($\sim$11 keV) in the north-west. The average gas velocity in the $3{^{\prime}} \times$ $4 {^{\prime}}$ region around the brightest cluster galaxy (BCG) covered by two Resolve pointings is consistent with that of the BCG to within 40 km s$^{-1}$ and we found modest average velocity dispersion of 230–250 km s$^{-1}$. On the other hand, spatially resolved spectroscopy reveals interesting variations. A blueshift of up to $\sim$230 km s$^{-1}$ is observed around the east edge of the cold front, where the gas with the lowest specific entropy is found. The region further south inside the cold front shows only a small velocity difference from the BCG; however, its velocity dispersion is enhanced to $\sim$400 km s$^{-1}$, implying the development of turbulence. These characteristics indicate that we are observing sloshing motion with some inclination angle following BCG and that gas phases with different specific entropy participate in sloshing with their own velocities, as expected from simulations. No significant evidence for a high-redshift ICM component associated with the subcluster Abell 2319B was found in the region covered by the current Resolve pointings. These results highlight the importance of sloshing and turbulence in shaping the internal structure of Abell 2319. Further deep observations are necessary to better understand the mixing and turbulent processes within the cluster.

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Publication Details

Journal
Publications of the Astronomical Society of Japan
Published
2025-11-13
DOI
https://doi.org/10.1093/pasj/psaf109
Citations
5
Primary Topic
Galaxies: Formation, Evolution, Phenomena
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article
Field-Weighted Citation Impact
5.77
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article

XRISM/Resolve view of Abell 2319: Turbulence, sloshing, and ICM dynamics

Kotaro Fukushima, Lía Corrales, Chris Done, Katsuhiro Hayashi et al.
5 citations
Publications of the Astronomical Society of Japan
Galaxies: Formation, Evolution, Phenomena
5.77
article

XRISM/Resolve view of Abell 2319: Turbulence, sloshing, and ICM dynamics

Kotaro Fukushima, Lía Corrales, Chris Done, Katsuhiro Hayashi, Ehud Behar, Kyoko Matsushita, Kouichi Hagino, M. Shidatsu, M. Audard, J. S. Kaastra, Paul P. Plucinsky, Kazuhiro Nakazawa, Erin Kara, S. Eguchi, Richard Kelley, Hirokazu Odaka, Luigi Gallo, Hideki Uchiyama, Hirofumi Noda, Kosuke Sato, Hisamitsu Awaki, Y. Terada, Jacco Vink, K. Mukai, María Díaz Trigo, Aya Bamba, Eric D. Miller, Yoshiaki Kanemaru, J. M. Mïller, Ryuichi Fujimoto, Satoshi Yamada, Yutaka Fujita, Javier A. García, Andrew E. Szymkowiak, Kenji Hamaguchi, Takayuki Hayashi, T. R. Kallman, Anna Ogorzałek, A. Simionescu, Megan E. Eckart, S. Paltani, Edmund Hodges‐Kluck, Renata Cumbee, Hiroyuki Uchida, Hironori Matsumoto, A. E. Hornschemeier, Mai Takeo, Daiki Ishi, Gregory V. Brown, Hiroya Yamaguchi, Adam Foster, R. Seppi, Laura Brenneman, Masahiro Tsujimoto, Yoshitomo Maeda, Liyi Gu, Noriko Y. Yamasaki, D. McCammon, Shōgo Kobayashi, K. Yamaoka, Jan‐Uwe Ness, Michael Loewenstein, Hiromasa Suzuki, Naomi Ota, M. Guainazzi, Keisuke Tamura, Takaaki Tanaka, Satoru Katsuda, Tsunefumi Mizuno, Randall K. Smith, Yoshihiro Ueda, M. Tashiro, M. Yamauchi, Ikuyuki Mitsuishi, Teruaki Enoto, Takeshi Go Tsuru, Isamu Hatsukade, Ken Ebisawa, Maurice A. Leutenegger, Takashi Okajima, F. S. Porter, D. Eckert, Maxim Markevitch, R. F. Mushotzky, Natalie Hell, Kumiko Nobukawa, Yuki Omiya, Y. Fukazawa, Makoto Sawada, Ralf Ballhausen, Mihoko Yukita, B. R. McNamara, Brian J. Williams, Masayoshi Nobukawa, Misaki Mizumoto, Rozenn Boissay-Malaquin, François Mernier, K. Pottschmidt, Shunji Kitamoto, T. Yoneyama, Robert Petre, Toshiki Sato, E. Costantini, H. Takahashi, S. Yamada, Yuusuke Uchida, Yuichi Terashima, Yuto Ichinohe, A. Tanimoto, Caroline A. Kilbourne, Shoji Ogawa, Nagomi Uchida, Koji Mori, Shin Watanabe, Yoshitaka Ishisaki, Kumi Ishikawa, Yohko Tsuboi, Hiromi Seta, Hiroshi Murakami, Aya Kubota, Hiroshi Nakajima, Hiroshi Tsunemi, Tadayasu Dotani, Akihiro Furuzawa, Yuichiro Ezoe, Toru Tamagawa, Shiníchiro Uno, M. Ishida, Tessei Yoshida, Tahir Yaqoob, Takayoshi Kohmura, Itsuki Aihara
article en
5 citations

Abstract

Abstract We present results from XRISM/Resolve observations of the core of the galaxy cluster Abell 2319, focusing on its kinematic properties. The intracluster medium (ICM) exhibits temperatures of approximately 8 keV across the core, with a prominent cold front and a high-temperature region ($\sim$11 keV) in the north-west. The average gas velocity in the $3{^{\prime}} \times$ $4 {^{\prime}}$ region around the brightest cluster galaxy (BCG) covered by two Resolve pointings is consistent with that of the BCG to within 40 km s$^{-1}$ and we found modest average velocity dispersion of 230–250 km s$^{-1}$. On the other hand, spatially resolved spectroscopy reveals interesting variations. A blueshift of up to $\sim$230 km s$^{-1}$ is observed around the east edge of the cold front, where the gas with the lowest specific entropy is found. The region further south inside the cold front shows only a small velocity difference from the BCG; however, its velocity dispersion is enhanced to $\sim$400 km s$^{-1}$, implying the development of turbulence. These characteristics indicate that we are observing sloshing motion with some inclination angle following BCG and that gas phases with different specific entropy participate in sloshing with their own velocities, as expected from simulations. No significant evidence for a high-redshift ICM component associated with the subcluster Abell 2319B was found in the region covered by the current Resolve pointings. These results highlight the importance of sloshing and turbulence in shaping the internal structure of Abell 2319. Further deep observations are necessary to better understand the mixing and turbulent processes within the cluster.

Publications of the Astronomical Society of JapanVol. 77(6)
Kagoshima University (JP), Hiroshima University (JP), University of Geneva (CH), University of Miyazaki (JP), Kumamoto Gakuen University (JP), Leiden University (NL), California Institute of Technology (US), Nihon Fukushi University (JP), Lawrence Livermore National Laboratory (US), Shizuoka University (JP), Goddard Space Flight Center (US), European Southern Observatory (DE), Rikkyo University (JP), University of Wisconsin–Madison (US), Pioneer (United States) (US), Johns Hopkins University (US), Nara University of Education (JP), University of Waterloo (CA), Konan University (JP), Tokyo University of Science (JP), Meiji University (JP), Kyoto Sangyo University (JP), Shibaura Institute of Technology (JP), Technion – Israel Institute of Technology (IL), Durham University (GB), Tohoku University (JP), Kanto Gakuin University (JP), Kyoto University (JP), University of Michigan (US), University of Teacher Education Fukuoka (JP), Japan Aerospace Exploration Agency (JP), European Space Agency (FR), Yale Cancer Center (US), Tohoku Gakuin University (JP), Yale University (US), University of Chicago (US), European Space Astronomy Centre (ES), Pioneer (Japan) (JP), RIKEN (JP), Center for Astrophysics Harvard & Smithsonian (US), Fujita Health University Hospital (JP), Institute of Space and Astronautical Science (JP), Astronomical Institute of the Slovak Academy of Sciences (SK), RIKEN Nishina Center (JP), University of Toyama (JP), Ehime University (JP), Leiden Observatory, European Space Research and Technology Centre (NL), Space Research Organisation Netherlands (NL), Nagoya University (JP), Massachusetts Institute of Technology (US), Saint Mary's University (CA), University of Maryland, College Park (US), Tokyo Metropolitan University (JP), Saitama University (JP), The University of Tokyo (JP), University of Maryland, Baltimore County (US), University of Amsterdam (NL), Kindai University (JP), Chuo University (JP), The University of Osaka (JP), Nara Women's University (JP)
Openalex Percentile: Top 4%
Galaxies: Formation, Evolution, Phenomena
5.77
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