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LOFAR and APERTIF Surveys of the Radio Sky: Probing Shocks and Magnetic Fields in Galaxy Clusters

H. Rottgering ; J. Afonso ; P. Barthel ; Fabien Batejat (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium) ; P. Best ; A. Bonafede ; M. Bruggen ; G. Brunetti ; K. Chyzy ; John Conway (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium) ; F. De Gasperin ; C. Ferrari ; M. Haverkorn ; G. Heald ; M. Hoeft ; N. Jackson ; M. Jarvis ; L. Ker ; M. Lehnert ; G. Macario ; J. McKean ; G. Miley ; R. Morganti ; T. Oosterloo ; E. Orru ; R. Pizzo ; D. Rafferty ; A. Shulevski ; C. Tasse ; I. van Bemmel ; B. van der Tol ; R. van Weeren ; M. Verheijen ; G. White ; M. Wise
Journal of Astrophysics and Astronomy (0250-6335). Vol. 32 (2011), 4, p. 557-566.
[Artikel, refereegranskad vetenskaplig]

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 APERTIF-phased 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 similar to 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.

Nyckelord: Galaxies: clusters: general, intracluster medium, radio continuum:, galaxies, radio telescopes, abell 2256, 1.4 ghz, emission, halos



Denna post skapades 2012-02-23. Senast ändrad 2014-09-02.
CPL Pubid: 155367

 

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Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium

Ämnesområden

Astronomi, astrofysik och kosmologi

Chalmers infrastruktur