Author/Authors :
Girardi، M. نويسنده , , Rigoni، E. نويسنده , , Mardirossian، F. نويسنده , , Mezzetti، M. نويسنده , , Marinoni، C. نويسنده ,
Abstract :
We compare properties of galaxies in loose groups with those in field environment by analyzing the Nearby Optical Galaxy (NOG) catalog of galaxy systems. We consider as group galaxies objects belonging to systems with at least five members identified by means of the "friends of friends method", and, as field galaxies, all galaxies with no companions. We analyze both a magnitude-limited sample of 959 and 2035 galaxies (groups vs. field galaxies, respectively, B<14 mag, and 2000
Keywords :
Clusters , fundamental parameters , Evolution , general , galaxies , Observations , cosmology
Journal title :
Astronomy and Astrophysics
Journal title :
Astronomy and Astrophysics