Flux- and volume-limited groups/clusters for the SDSS galaxies: catalogues and mass estimation
Abstract
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 http://cosmodb.to.ee and the Strasbourg Astronomical Data Center (CDS).
Keywords
Cite
@article{arxiv.1402.1350,
title = {Flux- and volume-limited groups/clusters for the SDSS galaxies: catalogues and mass estimation},
author = {E. Tempel and A. Tamm and M. Gramann and T. Tuvikene and L. J. Liivamägi and I. Suhhonenko and R. Kipper and M. Einasto and E. Saar},
journal= {arXiv preprint arXiv:1402.1350},
year = {2014}
}
Comments
16 pages, 18 figures, 2 tables, accepted for publication in A&A