Halo and Relic Sources in Clusters of Galaxies

Details Halo and Relic Sources in Clusters of Galaxies Halo and Relic Sources in Clusters of Galaxies

2000-08-22

arxiv.org/abs/astro-ph/0008342v1

Astronomy and Astrophysics

Astrophysics

16 Figures in separated files. A large ps file with figures (gg-aug00.ps.gz) in the text is avaialble at ftp://terra.bo.cnr.

Scientific paper

10.1016/S1384-1076(00)00034-8

New images of 7 radio halos and relics, obtained with the Very Large Array at 20 or 90 cm, are presented here. The existence of a cluster-wide radio halo in the clusters A 665 and CL 0016+16 is confirmed. Both these clusters share the properties of the other clusters with radio halos, i.e. are luminous in X-rays, have high temperature, and show recent merger processes. No diffuse sources are detected in a sample of clusters showing at least a tailed radio galaxy within 300 kpc from the cluster center, indicating that the connection between tailed radio galaxies and halos is not relevant. For these clusters we give limits to the surface brightness and to the angular size of possible undetected diffuse sources.

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