Are compact groups of galaxies physically dense?

Details Are compact groups of galaxies physically dense? Are compact groups of galaxies physically dense?

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...307..426m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 307, Aug. 15, 1986, p. 426-430.

Astronomy and Astrophysics

Astrophysics

133

Astrophysics, Galactic Clusters, Space Density, Density Distribution, Random Processes

Scientific paper

The properties of the compact groups of galaxies cataloged by Hickson (1982) are compared to the output of over 1000 numerical simulations of small groups of galaxies. Rather than being dense physical systems or transient unbound cores of loose groups, it is argued that roughly half of the compact groups in Hickson's catalog are simply chance alignments of galaxies within loose groups.

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