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LOFAR and APERTIF Surveys of the radio sky: probing shocks and magnetic fields in galaxy clusters

Röttgering, Huub; Afonso, Jose; Barthel, Peter; Batejat, Fabien; Best, Philip; Bonafede, Annalisa; Brüggen, Marcus; Brunetti, Gianfranco; Chyży, Krzysztof; Conway, John; Gasperin, Francesco De; Ferrari, Chiara; Haverkorn, Marijke; Heald, George; Hoeft, Matthias; Jackson, Neal; Jarvis, Matt; Ker, Louise; Lehnert, Matt; Macario, Giulia; McKean, John; Miley, George; Morganti, Raffaella; Oosterloo, Tom; Orrù, Emanuela; Pizzo, Roberto; Rafferty, David; Shulevski, Alexander; Tasse, Cyril; Bemmel, Ilse van; Tol, Bas; Weeren, Reinout; Verheijen, Marc; White, Glenn and Wise, Michael (2012). LOFAR and APERTIF Surveys of the radio sky: probing shocks and magnetic fields in galaxy clusters. Journal of Astrophysics and Astronomy, 32(4) pp. 557–566.

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DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1007/s12036-011-9129-x
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Abstract

At very low frequencies, the new pan-European radio telescope LOFAR is opening the last unexplored window of the electromagnetic spectrum for astrophysical studies. The revolutionary APERTIFphased arrays that are about to be installed on the Westerbork radio telescope (WSRT) will dramatically increase the survey speed for the WSRT. Combined surveys with these two facilities will deeply chart the northern sky over almost two decades in radio frequency from ∼15 up to 1400 MHz. Here we briefly describe some of the capabilities of these new facilities and what radio surveys are planned to study fun-damental issues related to the formation and evolution of galaxies and clusters of galaxies. In the second part we briefly review some recent observational results directly showing that diffuse radio emission in clusters traces shocks due to cluster mergers. As these diffuse radio sources are relatively bright at low frequencies, LOFAR should be able to detect thousands of such sources up to the epoch of cluster formation. This will allow addressing many question about the origin and evolution of shocks and magnetic fields in clusters. At the end we briefly review some of the first and very preliminary LOFAR results on clusters.

Item Type: Journal Article
Copyright Holders: 2012 Indian Academy of Sciences
ISSN: 0973-7758
Extra Information: pp.557-566
Keywords: clusters; intracluster medium; radio continuum; radio telescopes
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 32540
Depositing User: Glenn White
Date Deposited: 13 Feb 2012 10:44
Last Modified: 01 Feb 2014 10:59
URI: http://oro.open.ac.uk/id/eprint/32540
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