New measurements of radial velocities in clusters of galaxies-V

As a part of our galaxy-cluster redshift survey, we present a set of 79 new velocities in the 4 clusters Abell 376, Abell 970, Abell 1356, and Abell 2244, obtained at Haute-Provence observatory. This set now completes our previous analyses, especially for the first two clusters. Data on individual galaxies are presented, and we discuss some cluster properties. For A376, we obtained an improved mean redshift overline{z} = 0.04750 with a velocity dispersion of σ_V = 860 km s^-1. For A970, we have overline{z} = 0.05875 with σ_V = 881 km s^-1. We show that the A1356 cluster is not a member of the “Leo-Virgo” supercluster at a mean redshift overline{z} = 0.112 and should be considered just as a foreground group of galaxies at overline{z} = 0.0689, as well as A1435 at overline{z} = 0.062. We obtain overline{z} = 0.09962 for A2244 with σ_V = 965 km s^-1. The relative proximity of clusters A2244 and A2245 (overline{z} = 0.08738, σ_V = 992 km s^-1) suggests that these could be members of a supercluster that would include A2249; however, from X-ray data there is no indication of interaction between A2244 and A2245.

Based on observations made Haute-Provence observatory (France).Table 1 is also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/515/A57