期刊
ASTROPHYSICAL JOURNAL
卷 723, 期 2, 页码 985-992出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/723/2/985
关键词
galaxies: clusters: general
资金
- Jan Kochanowski University [BS 052]
- National Aeronautics and Space Administration
We present an analysis of the spatial orientations of galaxies in 247 optically selected rich Abell clusters which have at least 100 members in the considered area. We investigated the relation between angles that give information about galaxy angular momenta and the number of members in each structure. The position angles of the galaxies' major axes, as well as two angles describing the spatial orientation of the galaxy plane, were tested for isotropy by applying three different statistical tests. It is found that the values of the statistics increase with the amount of the galaxies' members, which is equivalent to the existence of a relation between anisotropy and the number of galaxies in a cluster. The search for connection between the galaxies' alignments and Bautz-Morgan ( BM) morphological types of examined clusters showed a weak dependence. A statistically marginal relation between velocity dispersion and cluster richness was observed. In addition, it was found that the velocity dispersion decreases with BM type at almost 3 sigma level. These results show the dependence of alignments with respect to clusters' richness, which can be regarded as an environmental effect.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据