Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.260..475k&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 260, no. 3, p. 475-477.
Astronomy and Astrophysics
Astronomy
3
Galactic Evolution, Interacting Galaxies, Astronomical Models, Dark Matter, Radial Velocity
Scientific paper
The character of the galaxy motions in three observed samples of galaxy triplets is studied using data on the radial velocities and relative positions of the components in the plane of the sky. These three samples are very different with respect to the compactness of the triplets, We demonstrate an isotropic distribution of the velocities of the components for the 45 triplets from the list of Karachentseva et al. (1979, 1989) that are probably physically associated, as well as for the 50 triplets from the Catalogue of Southern Galaxy Groups. For the 40 triplets from the galaxy groups of Huchra & Geller, both isotropic systems and collapsing (or expanding) systems are possible. The isotropic distribution of velocities suggests virialized systems, possibly with large amounts of dark matter.
Kiseleva Liudmila
Orlov Viktor
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