Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters

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	Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters
	Chen Y(陈勇); Chen, Y; Reiprich, TH; Bohringer, H; Ikebe, Y; Zhang, YY
刊名	ASTRONOMY & ASTROPHYSICS
	2007
卷号	466 期号:3 页码:805-U28
关键词	galaxies : clusters : general galaxies : intergalactic medium X-ray : galaxies : clusters
通讯作者	Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China ; Max Planck Inst Extraterr Phys, D-85748 Garching, Germany ; Univ Bonn, Argelander Inst Astron, D-53121 Bonn, Germany ; Natl Museum Emerging Sci & Innovat, Tokyo 1350064, Japan
英文摘要	We present a statistical study of the occurrence and effects of the cooling cores in the clusters of galaxies in a flux-limited sample, HIFLUGCS, based on ROSAT and ASCA observations. About 49% of the clusters in this sample have a significant, classically-calculated cooling-flow, mass-deposition rate. The upper envelope of the derived mass-deposition rate is roughly proportional to the cluster mass, and the fraction of cooling core clusters is found to decrease with it. The cooling core clusters are found to have smaller core radii than non-cooling core clusters, while some non-cooling core clusters have high beta values (> 0.8). In the relation of the X-ray luminosity vs. the temperature and the mass, the cooling core clusters show a significantly higher normalization. A systematic correlation analysis, also involving relations of the gas mass and the total infrared luminosity, indicates that this bias is shown to be mostly due to an enhanced X-ray luminosity for cooling core clusters, while the other parameters, like temperature, mass, and gas mass may be less affected by the occurrence of a cooling core. These results may be explained by at least some of the non-cooling core clusters being in dynamically young states compared with cooling core clusters, and they may turn into cooling core clusters in a later evolutionary stage.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
原文出处	SCI
语种	英语
WOS记录号	WOS:000246007400002
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/238525]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Chen Y,Chen, Y,Reiprich, TH,et al. Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters[J]. ASTRONOMY & ASTROPHYSICS,2007,466(3):805-U28.
APA	陈勇,Chen, Y,Reiprich, TH,Bohringer, H,Ikebe, Y,&Zhang, YY.(2007).Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters.ASTRONOMY & ASTROPHYSICS,466(3),805-U28.
MLA	陈勇,et al."Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters".ASTRONOMY & ASTROPHYSICS 466.3(2007):805-U28.