Hickson Compact Groups: The Cores of Elongated Loose Groups

Details Hickson Compact Groups: The Cores of Elongated Loose Groups Hickson Compact Groups: The Cores of Elongated Loose Groups

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001rmxaa..37..173t&link_type=abstract

Revista Mexicana de Astronomia y Astrofisica, Vol. 37, pp. 173-177 (2001)

Astronomy and Astrophysics

Astronomy

14

Scientific paper

Evidence is presented which indicates that almost all HCGs are dynamically associated with generally elongated loose groups of galaxies, and are compact cores of the latter. Mostly those loose groups, the direction of elongation of which makes angles close to 45 deg with the line of sight, were revealed by previous investigations. Hence, HCGs have, probably, longer life-times, than it has been deduced from N-body simulations, and thus are more stable configurations. The remote members of HCGs (the members of loose groups) are gravitationally bound with them.

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