Weak Merging Scenario of CLASH Cluster A209

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外文摘要：We study the structural and dynamical properties of A209 based on Chandra and XMM-Newton observations.We obtain detailed temperature,pressure,and entropy maps with the contour binning method,and find a hot region in the NW direction.The X-ray brightness residual map and corresponding temperature profiles reveal a possible shock front in the NW direction and a cold front feature in the SE direction.Combined with the galaxy luminosity density map we propose a weak merger scenario.A young sub-cluster passing from the SE to NW direction could explain the optical subpeak,the intracluster medium temperature map,the X-ray surface brightness excess,and the X-ray peak offset together.

外文关键词：

X-rays:galaxies:clustersgalaxies:clusters:intracluster mediumgalaxies:clusters:Abell 209

作者：

Wen-Cheng Feng、Heng Yu、Hai-Hui Zhao、Xiao-Lan Hou、Shu-Mei Jia、Cheng-Kui Li、Yu-Lin Cheng、Paolo Tozzi、Ming Sun、Yong Chen

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作者单位：

Department of Physics and Institute of Theoretical Physics,Nanjing Normal University,Nanjing 210023,China

Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China

Department of Astronomy,Beijing Normal University,Beijing 100875,China

Department of Astronomy,Yunnan University,Kunming 650091,China

INAF—Osservatorio Astrofisico di Arcetri,Largo E.Ferimi,50122 Firenze,Italy

Department of Astronomy,University of Virginia,P.O.Box 400325,Charlottesville,VA 22904-4325,USA

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaBureau of International Cooperation,Chinese Academy of Sciences

项目编号：

U203810411703014GJHZ1864

出版年：

2024

DOI：

10.1088/1674-4527/ad349a

天文和天体物理学研究

中国科学院国家天文台

天文和天体物理学研究

CSTPCD

影响因子：0.406

ISSN：1674-4527

年,卷(期)：2024.24(4)