中文

面向低丰度2dFGRS星团的星系簇亚结构分析

天体物理学 2011-03-10 v1

摘要

对星系簇中亚结构的存在进行的互补的一、二、三维检测方法应用于最近获得的2dF星系红移测量数据。本研究使用的25个星团样本中包括16个此前未针对亚结构进行探讨的星团。对于25个被研究的星团中,至少在一种检测方法下,亚结构在99%置信水平以上被检测到21个。从结果来看,低丰度星团通常包含正在发生合并的亚星团。约有一半的星团在星团中心0.5 h^{-1} Mpc范围内具有两个以上的成分,至少有三个星团(Abell 1139、Abell 1663和Abell S333)显示出与可能的星团旋转、剪切或吸积动力学相符的速度-位置特征。某些特征的几何形状与星系超星团环境的影响相一致。总体而言,我们的结果支持低丰度星团在非常漫长的动力学时间尺度上(如果的话)趋于无结构的平衡状态的假设。

关键词

引用

@article{arxiv.astro-ph/0405021,
  title  = {Substructure Analysis of Selected Low Richness 2dFGRS Clusters of Galaxies},
  author = {William S. Burgett and Michael M. Vick and David S. Davis and Matthew Colless and Roberto De Propris and Ivan Baldry and Carlton Baugh and Joss Bland-Hawthorn and Terry Bridges and Russell Cannon and Shaun Cole and Chris Collins and Warrick Couch and Nicholas Cross and Gavin Dalton and Simon Driver and George Efstathiou and Richard Ellis and Carlos Frenk and Karl Glazebrook and Edward Hawkins and Carole Jackson and Ofer Lahav and Ian Lewis and Stuart Lumsden and Steve Maddox and Darren Madgwick and Peder Norberg and John A. Peacock and Will Percival and Bruce Peterson and Will Sutherland and Keith Taylor},
  journal= {arXiv preprint arXiv:astro-ph/0405021},
  year   = {2011}
}

备注

Aceepted for publication in MNRAS; 54 pages, 43 figures, 7 tables