Statistics
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...708..101d&link_type=abstract
The Astrophysical Journal, Volume 708, Issue 1, pp. 101-108 (2010).
Statistics
5
Galaxies: Fundamental Parameters, Galaxies: Statistics
Scientific paper
Using two volume-limited Main galaxy samples of the Sloan Digital Sky Survey Data Release 6 above and below the value of M*, we have investigated the environmental dependence of other galaxy properties for the same star formation activities. Only in the luminous passive class, a strong environmental dependence of the g - r color is observed, but the environmental dependence of other properties in this class is very weak. In other classes, we can conclude that the local density dependence of luminosity, g - r color, concentration index ci, and morphologies for star-forming galaxies and passive ones is much weaker than that obtained in the volume-limited Main galaxy samples. This suggests that star formation activity is a galaxy property very predictive of the local environment. In addition, we also note that passive galaxies are more luminous, redder, highly concentrated, and preferentially "early type."
Bei Yang
Deng Xin-Fa
He Ji-Zhou
Tang Xiao-Xun
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