The bulk motion of gas in the core of the Centaurus galaxy cluster

• 成果类型: Article
• 署名作者: Audard, Marc; Awaki, Hisamitsu; Ballhausen, Ralf; Bamba, Aya; Behar, Ehud; Boissay-Malaquin, Rozenn; Brenneman, Laura; Brown, Gregory V.; Corrales, Lia; Costantini, Elisa; Cumbee, Renata; Done, Chris; Dotani, Tadayasu; Ebisawa, Ken; Eckart, Megan E.; Eckert, Dominique; Enoto, Teruaki; Eguchi, Satoshi; Ezoe, Yuichiro; Foster, Adam; Fujimoto, Ryuichi; Fujita, Yutaka; Fukazawa, Yasushi; Fukushima, Kotaro; Furuzawa, Akihiro; Gallo, Luigi; Garcia, Javier A.; Gu, Liyi; Guainazzi, Matteo; Hagino, Kouichi; Hamaguchi, Kenji; Hatsukade, Isamu; Hayashi, Katsuhiro; Hayashi, Takayuki; Hell, Natalie; Hodges-Kluck, Edmund; Hornschemeier, Ann; Ichinohe, Yuto; Ishida, Manabu; Ishikawa, Kumi; Ishisaki, Yoshitaka; Kaastra, Jelle; Kallman, Timothy; Kara, Erin; Katsuda, Satoru; Kanemaru, Yoshiaki; Kelley, Richard; Kilbourne, Caroline; Kitamoto, Shunji; Kobayashi, Shogo; Kohmura, Takayoshi; Kubota, Aya; Leutenegger, Maurice; Loewenstein, Michael; Maeda, Yoshitomo; Markevitch, Maxim; Matsumoto, Hironori; Matsushita, Kyoko; McCammon, Dan; McNamara, Brian; Mernier, Francois; Miller, Eric D.; Miller, Jon M.; Mitsuishi, Ikuyuki; Mizumoto, Misaki; Mizuno, Tsunefumi; Mori, Koji; Mukai, Koji; Murakami, Hiroshi; Mushotzky, Richard; Nakajima, Hiroshi; Nakazawa, Kazuhiro; Ness, Jan-Uwe; Nobukawa, Kumiko; Nobukawa, Masayoshi; Noda, Hirofumi; Odaka, Hirokazu; Ogawa, Shoji; Ogorzalek, Anna; Okajima, Takashi; Ota, Naomi; Paltani, Stephane; Petre, Robert; Plucinsky, Paul; Porter, Frederick Scott; Pottschmidt, Katja; Sato, Kosuke; Sato, Toshiki; Sawada, Makoto; Seta, Hiromi; Shidatsu, Megumi; Simionescu, Aurora; Smith, Randall; Suzuki, Hiromasa; Szymkowiak, Andrew; Takahashi, Hiromitsu; Takeo, Mai; Tamagawa, Toru; Tamura, Keisuke; Tanaka, Takaaki; Tanimoto, Atsushi; Tashiro, Makoto; Terada, Yukikatsu; Terashima, Yuichi; Trigo, Maria Diaz; Tsuboi, Yohko; Tsujimoto, Masahiro; Tsunemi, Hiroshi; Tsuru, Takeshi G.; Uchida, Hiroyuki; Uchida, Nagomi; Uchida, Yuusuke; Uchiyama, Hideki; Ueda, Yoshihiro; Uno, Shinichiro; Vink, Jacco; Watanabe, Shin; Williams, Brian J.; Yamada, Satoshi; Yamada, Shinya; Yamaguchi, Hiroya; Yamaoka, Kazutaka; Yamasaki, Noriko Y.; Yamauchi, Makoto; Yamauchi, Shigeo; Yaqoob, Tahir; Yoneyama, Tomokage; Yoshida, Tessei; Yukita, Mihoko; Zhuravleva, Irina; Kondo, Marie; Werner, Norbert; Plsek, Tomas; Sun, Ming; Hosogi, Kokoro; Majumder, Anwesh
• 署名单位: University of Geneva; Ehime University; University System of Maryland; University of Maryland College Park; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center; University of Tokyo; Technion Israel Institute of Technology; University System of Maryland; University of Maryland Baltimore County; Harvard University; Smithsonian Institution; United States Department of Energy (DOE); Lawrence Livermore National Laboratory; University of Michigan System; University of Michigan; Durham University; Japan Aerospace Exploration Agency (JAXA); Institute of Space & Astronautical Science (ISAS); Kyoto University; Tokyo Metropolitan University; Hiroshima University; Fujita Health University; Saint Marys University - Canada; California Institute of Technology; European Space Agency; European Space Research & Technology Centre; University of Miyazaki; RIKEN; Leiden University; Leiden University - Excl LUMC; Massachusetts Institute of Technology (MIT); Saitama University; Rikkyo University; Tokyo University of Science; Tokyo University of Science; Shibaura Institute of Technology; University of Osaka; University of Wisconsin System; University of Wisconsin Madison; University of Waterloo; Nagoya University; Hiroshima University; Tohoku Gakuin University; Kanto Gakuin University; European Space Agency; European Space Astronomy Center; Kindai University (Kinki University); Nara University Education; Tohoku University; Nara Womens University; High Energy Accelerator Research Organization (KEK); Meiji University; Yale University; Konan University; Kagoshima University; Chuo University; Shizuoka University; Kyoto University; University of Amsterdam; RIKEN; Johns Hopkins University; University of Chicago; Masaryk University; University of Alabama System; University of Alabama Huntsville; University of Amsterdam
• 刊物名称: Nature
• ISSN/ISSBN: 0028-3634
• DOI: 10.1038/s41586-024-08561-z
• 发表日期: 2025-02-13
• 页码: 365-+
• 关键词: cooling flows; atmospheres; turbulence; feedback

摘要

Galaxy clusters contain vast amounts of hot ionized gas known as the intracluster medium (ICM). In relaxed cluster cores, the radiative cooling time of the ICM is shorter than the age of the cluster. However, the absence of line emission associated with cooling suggests heating mechanisms that offset the cooling, with feedback from active galactic nuclei (AGNs) being the most likely source(1,2). Turbulence and bulk motions, such as the oscillating ('sloshing') motion of the core gas in the cluster potential well, have also been proposed as mechanisms for heat distribution from the outside of the core(3,4). Here we present X-ray spectroscopic observations of the Centaurus galaxy cluster with the X-Ray Imaging and Spectroscopy Mission satellite. We find that the hot gas flows along the line of sight relative to the central galaxy, with velocities from 130kms(-1) to 310kms(-1) within about 30kpc of the centre. This indicates bulk flow consistent with core gas sloshing. Although the bulk flow may prevent excessive accumulation of cooled gas at the centre, it could distribute the heat injected by the AGN and bring in thermal energy from the surrounding ICM. The velocity dispersion of the gas is found to be only less than or similar to 120kms(-1) in the core, even within about 10kpc of the AGN. This suggests that the influence of the AGN on the surrounding ICM motion is limited in the cluster.