LOFAR and APERTIF Surveys of the Radio Sky: Probing Shocks and Magnetic Fields in Galaxy Clusters
Journal article, 2011

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.

1.4 ghz

intracluster medium

galaxies

halos

radio continuum:

abell 2256

emission

radio telescopes

Galaxies: clusters: general

Author

H. Rottgering

Leiden University

J. Afonso

Faculdade de Ciencias, Universidade de Lisboa

P. D. Barthel

University of Groningen

Fabien Batejat

Chalmers, Earth and Space Sciences, Onsala Space Observatory

P. Best

Royal Observatory

A. Bonafede

Jacobs University Bremen

M. Brüggen

Jacobs University Bremen

G. Brunetti

Istituto di Radioastronomia

K. Chyzy

Jagiellonian University in Kraków

John Conway

Chalmers, Earth and Space Sciences, Onsala Space Observatory

F. De Gasperin

Max Planck Institute

C. Ferrari

Observatoire de la Cote d'Azur

M. Haverkorn

Netherlands Institute for Radio Astronomy (ASTRON)

Radboud University

Leiden University

G. Heald

Netherlands Institute for Radio Astronomy (ASTRON)

M. Hoeft

Thüringer Landessternwarte Tautenburg

N. Jackson

University of Manchester

M.J. Jarvis

University of Hertfordshire

L. Ker

Royal Observatory

M. Lehnert

GEPI - Galaxies, Etoiles, Physique, Instrumentation

G. Macario

Istituto di Radioastronomia

J. McKean

Netherlands Institute for Radio Astronomy (ASTRON)

G. Miley

Leiden University

R. Morganti

University of Groningen

Netherlands Institute for Radio Astronomy (ASTRON)

T. Oosterloo

University of Groningen

Netherlands Institute for Radio Astronomy (ASTRON)

E. Orru

Radboud University

R. Pizzo

Netherlands Institute for Radio Astronomy (ASTRON)

D. Rafferty

Leiden University

A. Shulevski

University of Groningen

C. Tasse

GEPI - Galaxies, Etoiles, Physique, Instrumentation

I. van Bemmel

Netherlands Institute for Radio Astronomy (ASTRON)

B. van der Tol

Leiden University

R. van Weeren

Leiden University

M. Verheijen

University of Groningen

G. White

Open University

M. Wise

Netherlands Institute for Radio Astronomy (ASTRON)

Journal of Astrophysics and Astronomy

0250-6335 (ISSN)

Vol. 32 4 557-566

Subject Categories

Astronomy, Astrophysics and Cosmology

DOI

10.1007/s12036-011-9129-x

More information

Latest update

9/6/2018 1