Compact groups of galaxies in the nearby universe

Details Compact groups of galaxies in the nearby universe Compact groups of galaxies in the nearby universe

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...297...56g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 297, no. 1, p. 56-60

Astronomy and Astrophysics

Astrophysics

17

Brightness, Compact Galaxies, Galactic Structure, Mass To Light Ratios, Radial Velocity, Radii, Stellar Luminosity

Scientific paper

We have searched for compact groups of galaxies among the largest catalog of nearby groups (LGG catalog). 21 new compact groups of at least 3 members were found. Their surface brightnesses are generally lower than those of Hickson compact groups (HCGs), and their characteristics are close to those of loose groups. We have also retrieved all HCGs of the nearby universe. These are all embedded in groups, forming the cores or substructures of loose groups. These results suggest that compact groups may form as core or substructures within loose groups (like the HCGs), or form from loose groups when they start collapsing (like those of the LGG).

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