Radio and X-ray diffuse emission in six clusters of galaxies

Deep Very Large Array radio observations confirm the presence of halo and r elic sources in six clusters of galaxies (A115, A520, A773, A1664, A2254, A 2744) where a wide diffuse emission was previously found in the NRAO VLA Sk y Survey. New images at 1.4 GHz of these six clusters of galaxies are prese nted and X-ray data obtained from the ROSAT archive are analyzed. The prope rties of clusters hosting radio halos and relics are analyzed and discussed . A correlation between the halo radio power and the cluster gravitational mass is presented.