NAOC Open IR  > 星系宇宙学研究部
The effect of radiative cooling on the scale dependence of the global stellar and gas content of groups and clusters of galaxies
Wu, XP; Xue, YJ
2002-06-10
发表期刊ASTROPHYSICAL JOURNAL
卷号572期号:1页码:L19-L22
摘要It is widely believed that the global baryon content and the mass-to-light ratio of groups and clusters of galaxies are fair representatives of the matter mix of the universe and therefore can be used to reliably determine the cosmic mass density parameter Omega(M). However, this fundamental assumption is challenged by growing evidence from optical and X-ray observations that the average gas mass fraction and mass-to-light ratio increase mildly with scale from poor groups to rich clusters. Although a number of time-consuming hydrodynamical simulations combined with semianalytic approaches have been carried out that permit a sophisticated treatment of some complicated processes in the formation and evolution of cosmic structures, the essential physics behind the phenomenon still remains a subject of intense debate. In this Letter, using a simple analytic model, we show that radiative cooling of the hot intragroup/intracluster gas may allow one to reproduce the observed scale dependence of the global stellar and gas mass fractions and mass-to-light ratio of groups and clusters, provided that about half of the cooled gas is converted into stars. Together with the recent success in the recovery of the entropy excess and the steepening of the X-ray luminosity-temperature relations detected in groups and clusters, radiative cooling provides a simple, unified scheme for the evolution of hot gas and the formation of stars in the largest virialized systems of the universe.
关键词Cosmology : Theory Galaxies : Clusters : General Galaxies : Formation Intergalactic Medium
收录类别SCI
语种英语
WOS记录号WOS:000176005600005
引用统计
被引频次:30[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8494
专题星系宇宙学研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan
推荐引用方式
GB/T 7714
Wu, XP,Xue, YJ. The effect of radiative cooling on the scale dependence of the global stellar and gas content of groups and clusters of galaxies[J]. ASTROPHYSICAL JOURNAL,2002,572(1):L19-L22.
APA Wu, XP,&Xue, YJ.(2002).The effect of radiative cooling on the scale dependence of the global stellar and gas content of groups and clusters of galaxies.ASTROPHYSICAL JOURNAL,572(1),L19-L22.
MLA Wu, XP,et al."The effect of radiative cooling on the scale dependence of the global stellar and gas content of groups and clusters of galaxies".ASTROPHYSICAL JOURNAL 572.1(2002):L19-L22.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Wu, XP]的文章
[Xue, YJ]的文章
百度学术
百度学术中相似的文章
[Wu, XP]的文章
[Xue, YJ]的文章
必应学术
必应学术中相似的文章
[Wu, XP]的文章
[Xue, YJ]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。