| Issue |
A&A
Volume 474, Number 3, November II 2007
|
|
|---|---|---|
| Page(s) | 783 - 791 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20066407 | |
| Published online | 23 October 2007 | |
The main galaxy groups from the SDSS data release 5*
School of Science, Nanchang University, Jiangxi 330031, PR China e-mail: xinfadeng@163.com
Received:
16
September
2006
Accepted:
3
August
2007
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 
= 1.97 Mpc by the three-dimensional friends-of-friends (FOF) algorithm, where 
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.
Key words: galaxies: fundamental parameters / cosmology: large-scale structure of Universe
© ESO, 2007
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