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arXiv · 1107.5945

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

C. Ferrari·H. T. Intema·E. Orrù·F. Govoni·M. Murgia·B. Mason·H. Bourdin·K. M. Asad·P. Mazzotta·M. W. Wise·T. Mroczkowski·J. H. Croston
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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.

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C. Ferrari, H. T. Intema, E. Orrù, F. Govoni, M. Murgia, B. Mason, H. Bourdin, K. M. Asad, P. Mazzotta, M. W. Wise, T. Mroczkowski, J. H. Croston. 2011-07-29. Discovery of the correspondence between intra-cluster radio emission and a high pressure region detected through the Sunyaev-Zel'dovich effect. https://doi.org/10.1051/0004-6361/201117788

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