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
复制标题
DOI:
10.1051/0004-6361/201423585
复制
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;
中科院分区:
文献类型:
--
作者:
E. Tempel;E. Tempel;A. Tamm;M. Gramann;T. Tuvikene;L. Liivamägi;L. Liivamägi;I. Suhhonenko;
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).