Dispersion of radial velocities in the local supercluster

Details Dispersion of radial velocities in the local supercluster Dispersion of radial velocities in the local supercluster

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985crasb.300....9g&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie II Mecanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Terre

Statistics

Computation

Galactic Clusters, Radial Velocity, Galactic Rotation, Red Shift, Spiral Galaxies, Statistical Analysis

Scientific paper

The motion of the local supercluster of galaxies is investigated by means of statistical analysis of observational data on a sample of 228 spiral galaxies of both hemispheres taken from the sample of de Vaucouleurs et al. (1981). The distances and redshift-based velocities of the galaxies are determined by the method of Tully and Fisher (1977) as modified by Giraud (1984) and compared to the radial velocities, and model computations are performed with the aim of minimizing the differences. Best results, with a dispersion of sigma(V) = about 250 km/s, are obtained using a model which incorporates solar motion and supercluster rotation and contraction, and this finding is considered comparable to the dispersion found by de Vaucouleurs et al. (1981), sigma(V) = 200 km/s.

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