Radio Halos and Relics in Clusters of Galaxies and Detection Statistics
Gabriele Giovannini, Luigina Feretti, Federica Govoni
Abstract
New sensitive VLA observations confirm the existence of halo and relic sources in 6 Abell clusters where a diffuse emission was found in the NVSS. We find evidence that the frequency of clusters with halos and relics is larger in clusters with high X-ray luminosity. The evidence that the occurrence of a halo source is larger at high redshifts is marginal.
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