NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-12-14 T16:56:59 PST
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For refcode 2001A&A...373..106F:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2001A&A...373..106F The giant radio halo in Abell 2163. FERETTI L., FUSCO-FEMIANO R., GIOVANNINI G., GOVONI F. Received 7 February 2001/Accepted 11 April 2001 Abstract. New radio data is presented for the rich cluster Abell 2163. The cluster radio emission is characterized by the presence of a radio halo, which is one of the most powerful and extended halos known so far. In the NE peripheral cluster region, we also detect diffuse elongated emission, which we classify as a cluster relic. The cluster A2163 is very hot and luminous in X-ray. Its central region is probably in a highly non relaxed state, suggesting that this cluster is likely to be a recent merger. The existence of a radio halo in this cluster confirms that halos are associated with hot massive clusters, and confirms the connection between radio halos and cluster merger processes. The comparison between the radio emission of the halo and the cluster X-ray emission shows a close structural similarity. A power law correlation is found between the radio and X-ray brightness, with index =0.64. We also report the upper limit to the hard X-ray emission, obtained from a BeppoSAX observation. We discuss the implications of our results. Key words: radio continuum: general - galaxies: clusters: general - galaxies: clusters: individual: A2163 - intergalactic medium - X-rays: galaxies: clusters
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