We study the internal dynamics of the rich galaxy cluster ABGC 209 on the basis of new spectroscopic and photometric data. The distribution in redshift shows that ABCG 209 is a well isolated peak of 112 detected member galaxies at z=0.209, characterised by a high value of the line-of-sight velocity dispersion, {sigma}v=1250-1400km/s, on the whole observed area (1h^-1^Mpc from the cluster center), that leads to a virial mass of M=1.6-2.2x10^15^h^-1^M_{sun}_ within the virial radius, assuming the dynamical equilibrium. The data were collected at the ESO New Technology Telescope (NTT) with the ESO Multi Mode Instrument (EMMI) in October 2001.

Cone search capability for table J/A+A/397/431/table1 (Spectroscopic data)