XRISM Observations of Abell 1795: Evidence for Low Turbulence and Resonant Scattering
University of Arkansas(阿肯色大学);Massachusetts Institute of Technology(麻省理工学院);University of Waterloo(滑铁卢大学);University of Nottingham(诺丁汉大学);Japan Aerospace Exploration Agency (JAXA)(日本宇宙航空研究开发机构);Tokyo Metropolitan University(东京都立大学);University of Maryland, College Park(马里兰大学帕克分校);NASA / Goddard Space Flight Center(美国国家航空航天局戈达德太空飞行中心)
Arnab Sarkar, Eric D. Miller, Brian McNamara, Helen Russell, Kotaro Fukushima, Mark Bautz, Yutaka Fujita, Catherine E. Grant, François Mernier, Michael A. McDon… 展开作者
Arnab Sarkar, Eric D. Miller, Brian McNamara, Helen Russell, Kotaro Fukushima, Mark Bautz, Yutaka Fujita, Catherine E. Grant, François Mernier, Michael A. McDonald, Naomi Ota, Ayşegül Tümer, Daniel Wik
We present high-resolution X-ray spectroscopic observations of the cool-core galaxy cluster Abell~1795 obtained with XRISM/Resolve. The cluster was observed with two deep pointings: a 225 ks central exposure and a 113 ks northern exposure, extending to a projected radius of 320 kpc from the cluster center. Single-temperature fits reveal a clear radial gradient in the line-of-sight velocity dispersion, decreasing from 114 $\pm$ 11 km/s in the core to 68 $\pm$ 39 km/s at 320 kpc. The bulk velocities in the central regions are very low (22 $\pm$ 12 and 7 $\pm$ 21 km/s), indicating no significant relative motion between the brightest cluster galaxy (BCG) and the intracluster medium (ICM). Given that the central region includes the southward extending cool gas tail, this result disfavors the ``cooling-wake'' scenario and instead supports an AGN-uplift origin. We find that the nonthermal pressure fraction decreases with radius, from $P_{\rm NT}/P_{\rm T}\approx2\%$ in the core to $\sim0.6\%$ at 330 kpc, suggesting that the northern ICM of A1795 is largely quiescent. Two-temperature and split energy-band (2--4 keV and 6--7 keV) fits identify two gas phases within the central $<1.5'$ region, providing strong evidence for multiphase gas in the cluster core. We detect a $\sim14\%$ resonant suppression of the optically thick Fe XXV $w$ line in the center. Additionally, we observe a significant excess in the Fe XXV $y$ line-flux relative to models. Accounting for uncertainties in the atomic data reduces this discrepancy, suggesting that atomic data uncertainties may contribute to the observed residual flux.
XRISM Reveals a Kinematically Coherent Core System of the Nearby Cool-Core Cluster Abell 2199
Tokyo University of Science(东京科学大学);Kyoto Sangyo University(京都产业大学);University of Alabama in Huntsville(阿拉巴马大学亨茨维尔分校);NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心);Rikkyo University(立教大学)
Unveiling Chemical Enrichment in the Abell 2029 Core with XRISM, XMM-Newton, and Chandra
Massachusetts Institute of Technology(麻省理工学院);University of Arkansas(阿肯色大学);University of Waterloo(滑铁卢大学);The University of Alabama in Huntsville(亨茨维尔阿拉巴马大学);University of Maryland, College Park(马里兰大学帕克分校);University of Chicago(芝加哥大学);Nara Women's University(奈良女子大学)
Bulk and turbulent gas motions in the interacting galaxy cluster Abell 3395 South observed with XRISM
Nara Women’s University(奈良女子大学);Argelander-Institut für Astronomie (AIfA), Universität Bonn(波恩大学阿尔兰德天体物理研究所);Max-Planck-Institut für Radioastronomie (MPIfR)(马克斯·普朗克射电天文研究所);INAF - Osservatorio Astronomico di Trieste(的里雅斯特天文台);IFPU - Institute for Fundamental Physics of the Universe(宇宙基础物理研究所);Universitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians-Universität München(慕尼黑大学物理学院大学天文台)
Gas rotation and turbulence in the galaxy cluster Abell 2029
Alma Mater Studiorum – Università di Bologna(博洛尼亚大学);INAF, Osservatorio di Astrofisica e Scienza dello Spazio(意大利国家天体物理研究所空间科学天文台);SRON Netherlands Institute for Space Research(荷兰空间研究所);INFN, Sezione di Bologna(意大利国家核物理研究所博洛尼区分部);University of Arkansas(阿肯色大学);MIT Kavli Institute for Astrophysics and Space Research(麻省理工学院卡弗里天体物理学与空间研究所);The University of Alabama in Huntsville(阿拉巴马大学亨茨维尔分校)
Are X-ray Atmospheres Heated by Turbulent Dissipation? XRISM Constraints
University of Waterloo(滑铁卢大学);Cambridge University(剑桥大学);University of Nottingham(诺丁汉大学);University of Western Australia(西澳大学);Harvard & Smithsonian(哈佛-史密森天体物理中心);SRON Space Research Organisation Netherlands(荷兰空间研究所);Leiden University(莱顿大学);The University of Tokyo(东京大学)
Turbulence in Simulated Local Cluster Analogs: One-to-one comparisons between SLOW and XRISM/Hitomi
Ludwig-Maximilians-Universität München(慕尼黑路德维希-马克西米利安大学);Università degli Studi di Trieste(的里雅斯特大学);INAF - Astronomical Observatory of Trieste(意大利国家天体物理研究所的里雅斯特天文台);INFN, Instituto Nazionale di Fisica Nucleare(意大利国家核物理研究所);ICSC - Italian Research Center on High Performance Computing, Big Data and Quantum Computing(意大利高性能计算、大数据和量子计算研究中心);European Southern Observatory(欧洲南方天文台);IFPU – Institute for Fundamental Physics of the Universe(宇宙基础物理研究所);Max-Planck-Institut für Astrophysik(马克斯·普朗克天体物理学研究所)
The Quiescent Sloshing Core of Abell 496 with XRISM
Argelander-Institut für Astronomie (AIfA), Universität Bonn(波恩大学阿根德天文学研究所);Nara Women’s University(奈良女子大学);Universitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians-Universität München(慕尼黑大学物理学院天文台);Max-Planck-Institut für Astrophysik(马克斯·普朗克天体物理学研究所);Max-Planck-Institut für extraterrestrische Physik(马克斯·普朗克地外物理学研究所);E.A Milne Centre for Astrophysics, University of Hull(赫尔大学E.A.米尔恩天体物理学中心)
A Brush with Turbulence: Probing the ICM Dynamics in the Merging Toothbrush Cluster using XRISM
Leiden University(莱顿大学);SRON, Space Research Organisation Netherlands(荷兰空间研究组织);Leiden Observatory, Leiden University(莱顿天文台,莱顿大学);Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo(东京大学宇宙物理与数学 Kavli 研究所(WPI));Waterloo Centre for Astrophysics, Department of Physics and Astronomy, University of Waterloo(滑铁卢大学天体物理中心,物理与天文学系,滑铁卢大学);Department of Physics, Nagoya University(名古屋大学物理学系);KMI, Nagoya University(名古屋大学 KMI);Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)(日本宇宙航空研究开发机构 JAXA 宇宙科学研究所 (ISAS));INAF - Istituto di Radioastronomia(意大利国家天体物理研究所射电天文研究所)
Kinetic structure of the intracluster medium across nearby clusters observed with XRISM
Nara Women’s University(奈良女子大学);Argelander-Institut für Astronomie (AIfA), Universität Bonn(波恩大学阿尔兰德天文学研究所);Frontier Research Institute for Interdisciplinary Sciences, Tohoku University(东北大学前沿交叉科学研究院);University of Geneva(日内瓦大学);Astronomical Institute, Tohoku University(东北大学天文研究所);Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)(日本宇宙航空研究开发机构空间科学研究所)
The Quiescent Merging Nature of the Coma Cluster Revealed by ICM Velocity Structure
Max-Planck-Institut für extraterrestrische Physik(马克斯·普朗克地外物理研究所);Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University(北京师范大学天文与前沿科学研究院);INAF - IASF Palermo(意大利国家天体物理研究所巴勒莫分院);Department of Astronomy, University of Geneva(日内瓦大学天文学系);Department of Physics and Astronomy, University of Alabama in Huntsville(阿拉巴马大学亨茨维尔分校物理与天文系)
Spectrally Resolved Gas Kinematics in Cygnus A: XRISM Detects AGN Jet-induced Velocity Dispersion in Multi-temperature Gas
Space Research Organisation Netherlands(荷兰空间研究组织);Center for Astrophysical Sciences, William H. Miller III Department of Physics and Astronomy, Johns Hopkins University(约翰斯·霍普金斯大学,威廉·H·米勒三世物理学与天文学系,天体物理学科学中心);School of Earth and Space Exploration, Arizona State University(亚利桑那州立大学,地球与太空探索学院);Leiden Observatory, Leiden University(莱顿大学,莱顿天文台);Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo(东京大学,宇宙物理与数学卡弗里研究所);RIKEN High Energy Astrophysics Laboratory(理化学研究所,高能天体物理实验室);Department of Physics, Tokyo University of Science(东京理科大学,物理学系);NASA / Goddard Space Flight Center(美国国家航空航天局,戈达德太空飞行中心);Anton Pannekoek Institute, University of Amsterdam(阿姆斯特丹大学,安东·潘内科克研究所)
Combined LOFAR-uGMRT analysis of the diffuse radio emission in the massive clusters Abell 773 and Abell 1351
Istituto Nazionale di Astrofisica (INAF) - Istituto di Radioastronomia (IRA)(意大利国家天体物理研究所-射电天文研究所);Dipartimento di Fisica e Astronomia (DIFA), Università di Bologna(博洛尼亚大学物理与天文学系);Istituto Nazionale di Astrofisica – Istituto di Astrofisica Spaziale e Fisica Cosmica (IASF)(意大利国家天体物理研究所-空间天体物理学与宇宙物理学研究所);University of Kashmir(克什米尔大学);Hamburger Sternwarte, Universität Hamburg(汉堡天文台,汉堡大学)
MeerKAT observations of Abell 1775 and Abell 1795: the discovery of a hadronic radio halo?
Leiden University(莱顿大学);University of Toronto(多伦多大学);INAF – Istituto di Radioastronomia(意大利国家天体物理研究所射电天文学研究所);Ruhr-Universität Bochum(波鸿鲁尔大学);Durham University(杜伦大学);Università di Bologna(博洛尼亚大学);University of Hamburg(汉堡大学)
Intracluster Medium Fluctuations on Scales up to 1 Mpc: A Combined eROSITA and SPT/Planck Analysis of Abell 3266
California Institute of Technology(加州理工学院);University of Chicago(芝加哥大学);Max-Planck-Institut fur extraterrestrische Physik (MPE)(马克斯·普朗克地外物理研究所);University of Michigan(密歇根大学);NASA Jet Propulsion Laboratory(美国宇航局喷气推进实验室);Sapienza University of Rome(罗马智慧大学);INAF – IRA(意大利国家天体物理研究所-博洛尼亚天文台)
Deep insights into Abell 2163: unveiling the treasure trove of ICM plasma physics
National Centre for Radio Astrophysics, Tata Institute of Fundamental Research(国家射电天体物理中心,塔塔基础研究所);INAF - IRA(意大利国家天体物理研究所-博洛尼亚天文台);Naval Research Laboratory(海军研究实验室);Dipartimento di Fisica, Università di Roma Tor Vergata(罗马托尔维加塔大学物理系);INFN, Sezione di Roma 2, Università di Roma Tor Vergata(罗马第二分校 INFN 分部,罗马托尔维加塔大学)