SIMBAD references

We present a spectroscopic catalog of the neighboring massive clusters Abell 222 and Abell 223. The catalog contains the positions, redshifts, R magnitudes, V-R color, as well as the equivalent widths for a number of lines for 183 galaxies, 153 of them belonging to the A 222 and A 223 system. We determine the heliocentric redshifts to be z=0.2126±0.0008 for A 222 and z=0.2079±0.0008 for A 223. The velocity dispersions of both clusters in the cluster restframe are about the same: σ= 1014⁺⁹⁰_–71km/s and σ=1032⁺⁹⁹_–76km/s for A 222 and A 223, respectively. While we find evidence for substructure in the spatial distribution of A 223, no kinematic substructure can be detected. From the red cluster sequence identified in a color-magnitude-diagram we determine the luminosity of both clusters and derive mass-to-light ratios in the R-band of (M/L)_A222=(202±43)h₇₀M_☉/L_☉ and (M/L)_A223=(149±33)h₇₀M_☉/L_☉. Additionally we identify a group of background galaxies at z∼0.242.