Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008a%26a...484..355d&link_type=abstract
Astronomy and Astrophysics, Volume 484, Issue 2, 2008, pp.355-360
Astronomy and Astrophysics
Astrophysics
14
Galaxy: General, Galaxies: Fundamental Parameters
Scientific paper
Aims: We investigate the dependence of galaxy properties on the local environment. Methods: Member galaxies of compact groups (CGs) and isolated galaxies are located at both extremes of density, which are identified from the volume-limited Main galaxy sample of the Sixth Data Release of the Sloan Digital Sky Survey(SDSS DR6), while the volume-limited Main galaxy sample represents the mean density. We perform comparative studies of distributions of various physical properties among member galaxies of CGs, isolated galaxies, and the volume-limited Main galaxy sample. Results: We find that physical properties of galaxies, such as luminosity, size, colors, concentration index, and morphology strongly depend on the local environment: luminous, red, and early-type galaxies exist preferentially in the densest regions of the universe (e.g., in groups), while faint, blue, and late-type galaxies are located preferentially in low-density regions.
Deng Xin-Fa
He Z. J.
Wu Patrick
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