The formation histories of galaxy clusters

被引：58

作者：

Cohn, JD ^{[1
]}

White, M

机构：

[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Phys & Astron, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Theoret Astrophys Ctr, Berkeley, CA 94720 USA

来源：

ASTROPARTICLE PHYSICS | 2005年 / 24卷 / 4-5期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

cosmology; galaxy clusters; mergers; formation times;

D O I：

10.1016/j.astropartphys.2005.07.006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A sample of hundreds of simulated galaxy clusters is used to study the statistical properties of galaxy cluster formation. Individual assembly histories are discussed, the degree of virialization is demonstrated and various commonly used formation times are measured and inter-compared. In addition, the fraction of clusters which have "recently" undergone a major merger or significant mass jump is calculated as a function of lookback time and interval. The fraction of three- and four-body mergers is also studied. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：316 / 333

页数：18

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