Volume 534, October 2011
|Number of page(s)||4|
|Published online||18 October 2011|
Letter to the Editor
Discovery of the correspondence between intra-cluster radio emission and a high pressure region detected through the Sunyaev-Zel’dovich effect
Université de Nice Sophia Antipolis, CNRS, Observatoire de la Côte d’Azur,
Laboratoire Cassiopée, Nice, France
2 National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903-2475, USA
3 Radboud University Nijmegen, Heijendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
4 INAF – Osservatorio Astronomico di Cagliari, Strada 54, Loc. Poggio dei Pini, 09012 Capoterra ( Ca), Italy
5 Dipartimento di Fisica, Università degli Studi di Roma “Tor Vergata”, via della Ricerca Scientifica 1, 00133 Roma, Italy
6 Master student of the “AstroMundus” Erasmus Mundus Masters Course
7 Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA
8 ASTRON, PO Box 2, 7990 AA Dwingeloo, The Netherlands
9 Astronomical Institute Anton Pannekoek, University of Amsterdam, Amsterdam, The Netherlands
10 University of Pennsylvania, 209 S. 33rd St., Philadelphia, PA 19104, USA
11 NASA Einstein Postdoctoral Fellow
12 School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK
Received: 29 July 2011
Accepted: 6 October 2011
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.
Key words: galaxies: clusters: individual: RX J1347-1145 / radio continuum: galaxies / X-rays: galaxies: clusters / cosmic background radiation
© ESO, 2011
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