Evidence for particle re-acceleration in the radio relic in the galaxy cluster PLCKG287.0+32.9
MetadataShow full item record
Radio relics are diffuse radio sources observed in galaxy clusters, probably produced by shock acceleration during cluster-cluster mergers. Their large size, of the order of 1 Mpc, indicates that the emitting electrons need to be (re)accelerated locally. The usually invoked diffusive shock acceleration models have been challenged by recent observations and theory. We report the discovery of complex radio emission in the Galaxy cluster PLCKG287.0+32.9, which hosts two relics, a radio halo, and several radio filamentary emission. Optical observations suggest that the cluster is elongated, likely along an intergalactic filament, and displays a significant amount of substructure. The peculiar features of this radio relic are that (1) it appears to be connected to the lobes of a radio galaxy and (2) the radio spectrum steepens on either side of the radio relic. We discuss the origins of these features in the context of particle re-acceleration. © 2014. The American Astronomical Society. All rights reserved..
Showing items related by title, author, creator and subject.
Deep Very Large Array Observations of the Merging Cluster CIZA J2242.8+5301: Continuum and Spectral ImagingGennaro, G.; Van Weeren, R.; Hoeft, M.; Kang, H.; Ryu, D.; Rudnick, L.; Forman, W.; Röttgering, H.; Brüggen, M.; Dawson, W.; Golovich, N.; Hoang, D.; Intema, Hubertus; Jones, C.; Kraft, R.; Shimwell, T.; Stroe, A. (2018)Despite the progress that has been made in understanding radio relics, there are still open questions regarding the underlying particle acceleration mechanisms. In this paper, we present deep 1-4 GHz Very Large Array (VLA) ...
Van Weeren, R.; Brunetti, G.; Brüggen, M.; Andrade-Santos, F.; Ogrean, G.; Williams, W.; Röttgering, H.; Dawson, W.; Forman, W.; Gasperin, F.; Hardcastle, M.; Jones, C.; Miley, G.; Rafferty, D.; Rudnick, L.; Sabater, J.; Sarazin, C.; Shimwell, T.; Bonafede, A.; Best, P.; Birzan, L.; Cassano, R.; Chyzy, K.; Croston, J.; Dijkema, T.; Enßlin, T.; Ferrari, C.; Heald, G.; Hoeft, M.; Horellou, C.; Jarvis, M.; Kraft, R.; Mevius, M.; Intema, Hubertus; Murray, S.; Orrú, E.; Pizzo, R.; Sridhar, S.; Simionescu, A.; Stroe, A.; Tol, S.; White, G. (2016)We present deep LOFAR observations between 120 and 181 MHz of the "Toothbrush" (RX J0603.3+4214), a cluster that contains one of the brightest radio relic sources known. Our LOFAR observations exploit a new and novel ...
A powerful double radio relic system discovered in PSZ1 G108.18-11.53: Evidence for a shock with non-uniform Mach number?de Gasperin, F.; Intema, Hubertus; van Weeren, R.; Dawson, W.; Golovich, N.; Wittman, D.; Bonafede, A.; Brüggen, M. (2015)Diffuse radio emission in the form of radio haloes and relics has been found in a number of merging galaxy clusters. These structures indicate that shock and turbulence associated with the merger accelerate electrons to ...