STRUCTURES OF SMALL-SIZE RADIO GALAXIES IN CLUSTERS

We present high resolution maps of a sample of radio galaxies belongin g to Abell clusters, showing linear size less than or similar to 20 kp c, i.e. completely embedded within the optical galaxy. These radio gal axies were unresolved or only slightly resolved in previous interferom etric observations. Most of the sources are resolved at the present re solution. Radio maps of all the resolved sources are given. The correl ation of the linear, size versus the total radio power at 1.4 GHz is d erived for radio galaxies belonging to clusters and is compared with t he results found in a non-cluster sample. The size of cluster sources is slightly smaller on average than that of non-cluster ones, but the difference is not statistically significant. The tailed structure, typ ical of cluster radio galaxies of large size, is found in similar to 2 4% of the sources of the present sample. This percentage is higher tha n in a non-cluster sample, but lower than in a cluster sample of radio galaxies with larger size. Tailed radio galaxies are mostly located a t the cluster centers, the smallest ones being identified with the bri ghtest cluster members. Stripping of the hot interstellar medium is su ggested to be present in these galaxies.