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Title:
The main galaxy groups from the SDSS data release 5
Authors:
Deng, Xin-Fa; He, Ji-Zhou; Jiang, Peng; Luo, Cheng-Hong; Wu, Ping
Affiliation:
AA(School of Science, Nanchang University, Jiangxi 330031, PR China ), AB(School of Science, Nanchang University, Jiangxi 330031, PR China), AC(School of Science, Nanchang University, Jiangxi 330031, PR China), AD(School of Science, Nanchang University, Jiangxi 330031, PR China), AE(School of Science, Nanchang University, Jiangxi 330031, PR China)
Publication:
Astronomy and Astrophysics, Volume 474, Issue 3, November II 2007, pp.783-791 (A&A Homepage)
Publication Date:
11/2007
Origin:
EDP
Keywords:
galaxies: fundamental parameters, cosmology:, large-scale structure of Universe
DOI:
10.1051/0004-6361:20066407
Bibliographic Code:
2007A&A...474..783D

Abstract

Aims. We investigate the correlations between galaxy properties and environment. Methods: From the main galaxy sample of the SDSS Data Release 5, we have extracted 11 163 groups at the linking length R0 = 0.2 ×bar{n}-1/3 = 1.97 Mpc by the three-dimensional friends-of-friends (FOF) algorithm, where bar{n} is the mean galaxy density, and compare basic properties of member galaxies of main galaxy groups with those of the main galaxy sample and isolated galaxies in each redshift bin. Results: The luminosities and sizes of galaxies are almost independent of environment, but morphologies and colors are correlated with environment-especially galaxy morphologies.

Full Table 2 is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/474/783

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