Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...199...85g&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 199, no. 1-2, June 1988, p. 85-90. Research supported by the Ministero della P
Astronomy and Astrophysics
Astronomy
24
Galactic Clusters, Galactic Evolution, Local Group (Astronomy), Virgo Galactic Cluster, Histograms, Kinetic Energy, Red Shift
Scientific paper
The authors present a method capable of determining the evolutionary stage of bound, isolated systems of galaxies. In particular they apply it to a sample of groups, belonging to the Local Supercluster, taken from the Geller and Huchra's (1983) catalogue. They find that most of them are still in the phase of collapse and not yet virialized. Their evolutionary stages are distributed around that of the Virgo cluster, which lies in a central position in the region considered. Moreover, the knowledge of the evolutionary stage of a system permits the determination of its mass even when it is not in virial equilibrium. The median M/L ratio of the groups in the sample proves to be in the range (550 - 700) hM_sun;/L_sun;(B) (H0 = h 100 km s-1Mpc-1).
Giuricin Giuliano
Gondolo Palo
Mardirossian Fabio
Mezzetti Marino
Ramella Massimo
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