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EDP Sciences, Astronomy & Astrophysics, (534), p. L12, 2011

DOI: 10.1051/0004-6361/201117788

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Discovery of the correspondence between intra-cluster radio emission and a high pressure region detected through the Sunyaev-Zel'dovich effect

Journal article published in 2011 by C. Ferrari ORCID, H. T. Intema, F. Govoni ORCID, E. Orrù, M. Murgia, B. Mason, H. Bourdin, K. M. Asad, P. Mazzotta, T. Mroczkowski ORCID, M. W. Wise, J. H. Croston
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We analyzed new 237 MHz and 614 MHz GMRT data of the most X-ray luminous galaxy cluster, RX J1347-1145. Our radio results are compared with the MUSTANG 90 GHz Sunyaev-Zel'dovich effect map and with re-processed Chandra and XMM-Newton archival data of this cluster. We point out for the first time in an unambiguous way the correspondence between a radio excess in a diffuse intra-cluster radio source and a hot region detected through both Sunyaev-Zel'dovich effect and X-ray observations. Our result indicates that electron re-acceleration in the excess emission of the radio mini-halo at the center of RX J1347-1145 is most likely related to a shock front propagating into the intra-cluster medium. ; Comment: Revised version in response to referee's comments; accepted for publication in Astronomy and Astrophysics Letters