Flux- and volume-limited groups/clusters for the SDSS galaxies: catalogues and mass estimation

Flux- and volume-limited groups/clusters for the SDSS galaxies: catalogues and mass estimation
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DOI:
10.1051/0004-6361/201423585
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发表时间:
2014-02
影响因子:
6.5
通讯作者:
E. Tempel;E. Tempel;A. Tamm;M. Gramann;T. Tuvikene;L. Liivamägi;L. Liivamägi;I. Suhhonenko;
E. Tempel;E. Tempel;A. Tamm;M. Gramann;T. Tuvikene;L. Liivamägi;L. Liivamägi;I. Suhhonenko;
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
E. Tempel;E. Tempel;A. Tamm;M. Gramann;T. Tuvikene;L. Liivamägi;L. Liivamägi;I. Suhhonenko;

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我们根据SDSS数据发布的10个星系的光谱样本,提供了通量限制和体积限制的星系群和星系团星表。我们使用了一个修改的朋友的朋友(FoF)的方法,在横向和径向方向上的可变链接长度,以确定尽可能多的现实群体。该限流星表包含了m_r = 17.77等的星系,共包括588193个星系和82458个星系群。在M_r =-18.0,-18.5,-19.0,-19.5,-20.0,-20.5和-21.0的绝对星等范围内,有限体积星表都是完备的,并且在不同的空间体积内都是完备的。我们的分析表明,通量有限和体积有限的组样本是很好的兼容彼此,特别是对于较大的群体/集群。动态质量估计,径向速度分散和组在天空中的范围的基础上,被添加到提取的组。目录可以通过这个http URL和斯特拉斯堡天文数据中心(CDS)访问。
We provide flux-limited and volume-limited galaxy group and cluster catalogues, based on the spectroscopic sample of the SDSS data release 10 galaxies. We used a modified friends-of-friends (FoF) method with a variable linking length in the transverse and radial directions to identify as many realistic groups as possible. The flux-limited catalogue incorporates galaxies down to m_r = 17.77 mag. It includes 588193 galaxies and 82458 groups. The volume-limited catalogues are complete for absolute magnitudes down to M_r = -18.0, -18.5, -19.0, -19.5, -20.0, -20.5, and -21.0; the completeness is achieved within different spatial volumes, respectively. Our analysis shows that flux-limited and volume-limited group samples are well compatible to each other, especially for the larger groups/clusters. Dynamical mass estimates, based on radial velocity dispersions and group extent in the sky, are added to the extracted groups. The catalogues can be accessed via this http URL and the Strasbourg Astronomical Data Center (CDS).