The color properties of compact groups of main galaxies from the SDSS Data Release 4

Details The color properties of compact groups of main galaxies from the SDSS Data Release 4 The color properties of compact groups of main galaxies from the SDSS Data Release 4

Jan 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ap.....50...18d&link_type=abstract

Astrophysics, Volume 50, Issue 1, pp.18-25

Astronomy and Astrophysics

Astrophysics

4

Galaxy, Fundamental Parameters-Galaxy, Large Scale Structure

Scientific paper

In order to compare color statistical properties of member galaxies in compact groups with those of field galaxies, we use a compact group (CG) sample which contains 4217 CGs extracted from the MAIN galaxy sample of the SDSS Data Release 4 (SDSS4), and construct a random group sample which has the same distributions of redshift and number of member galaxies as those of the CG sample. It turns out that the mean colors of galaxies in CGs are redder than those of galaxies in random groups. Additionally, we also find that member galaxies in real CGs have a smaller dispersion of colors than those in random groups-at least for g-r, r-i, and i-z colors.

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