Volume 566, June 2014
|Number of page(s)||16|
|Section||Catalogs and data|
|Published online||29 May 2014|
Flux- and volume-limited groups/clusters for the SDSS galaxies: catalogues and mass estimation⋆
Tartu Observatory, Observatooriumi 1,
2 National Institute of Chemical Physics and Biophysics, Rävala pst 10, 10143 Tallinn, Estonia
3 Leibniz-Institut für Astrophysik Potsdam, an der Sternwarte 16, 14482 Potsdam, Germany
4 Institute of Physics, University of Tartu, 51010 Tartu, Estonia
5 Estonian Academy of Sciences, Kohtu 6, 10130 Tallinn, Estonia
Accepted: 21 April 2014
We provide flux- and volume-limited galaxy group and cluster catalogues based on the spectroscopic sample of the galaxies of SDSS data release 10. We used a modified friends-of-friends 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 mr = 17.77 mag. It includes 588 193 galaxies and 82 458 groups. The volume-limited catalogues are complete for absolute magnitudes down to Mr,lim = −18.0, −18.5, −19.0, −19.5, −20.0, −20.5, and −21.0; the completeness is achieved within different spatial volumes. Our analysis shows that flux- and volume-limited group samples are well compatible, especially for the larger groups/clusters. Dynamical mass estimates based on radial velocity dispersions and group extent in the sky were added to the extracted groups.
Key words: galaxies: clusters: general / galaxies: groups: general / galaxies: statistics / large-scale structure of Universe / cosmology: observations / catalogs
The group catalogues are available at http://cosmodb.to.ee and at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (188.8.131.52) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/566/A1
© ESO, 2014
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