Powerful radio sources in clusters of galaxies.

Using a complete sample, correlations are investigated in position between radio sources with S408 of at least 1 Jy in the Molonglo Reference Catalogue and rich clusters of galaxies in the Abell, Corwin and Olowin catalog. Within a projected radius of 100 kpc of the cluster center, an overdensity of radio sources is observed similar to that seen by Robertson and Roach (1990). They attributed this feature to centrally located dominant cluster galaxies. The hypothesis is confirmed by looking at the morphology of the clusters within this peak and by optically identifying galaxies associated with the radio emission. Due to the relatively high flux-density limit imposed, the cluster radio sources in this sample are among the most powerful in the southern sky. The probability of a cluster containing a radio source of this power is found not to depend on cluster richness.