The radial velocity membership of the Virgo Cluster

Details The radial velocity membership of the Virgo Cluster The radial velocity membership of the Virgo Cluster

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991acaps..10..315z&link_type=abstract

(Acta Astrophysica Sinica, vol. 10, no. 4, 1990, p. 315-322) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 15, March

Astronomy and Astrophysics

Astrophysics

Galactic Structure, Irregular Galaxies, Radial Velocity, Red Shift, Virgo Galactic Cluster, Maximum Likelihood Estimates, Spatial Distribution, Velocity Distribution

Scientific paper

Applying the principle of maximum likelihood to the radial velocity data of 572 galaxies in the Virgo Cluster region, 434 were found to be members of the cluster. The mean heliocentric velocity is 1247 + or - 37 km/s, and the dispersion is 752 + or - 27 km/s. Analysis shows that although the Virgo Cluster has subcluster structures, the normal distribution can still be used as a reasonable first approximation to the distribution for the cluster members. Galaxies of different types seem to have different spatial distributions; the late type galaxies may still be in the stage of infall.

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