LOFAR and APERTIF Surveys of the Radio Sky: Probing Shocks and Magnetic Fields in Galaxy Clusters
Artikel i vetenskaplig tidskrift, 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

Författare

H. Rottgering

Universiteit Leiden

J. Afonso

Faculdade de Ciencias, Universidade de Lisboa

P. D. Barthel

Rijksuniversiteit Groningen

Fabien Batejat

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

P. Best

Royal Observatory

A. Bonafede

Jacobs University Bremen

M. Brüggen

Jacobs University Bremen

G. Brunetti

Istituto di Radioastronomia

K. Chyzy

Uniwersytet Jagiellonski w Krakowie

John Conway

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

F. De Gasperin

Max Planck-institutet

C. Ferrari

Observatoire de la Cote d'Azur

M. Haverkorn

Netherlands Institute for Radio Astronomy (ASTRON)

Radboud Universiteit

Universiteit Leiden

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

Universiteit Leiden

R. Morganti

Rijksuniversiteit Groningen

Netherlands Institute for Radio Astronomy (ASTRON)

T. Oosterloo

Rijksuniversiteit Groningen

Netherlands Institute for Radio Astronomy (ASTRON)

E. Orru

Radboud Universiteit

R. Pizzo

Netherlands Institute for Radio Astronomy (ASTRON)

D. Rafferty

Universiteit Leiden

A. Shulevski

Rijksuniversiteit Groningen

C. Tasse

GEPI - Galaxies, Etoiles, Physique, Instrumentation

I. van Bemmel

Netherlands Institute for Radio Astronomy (ASTRON)

B. van der Tol

Universiteit Leiden

R. van Weeren

Universiteit Leiden

M. Verheijen

Rijksuniversiteit 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

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1007/s12036-011-9129-x

Mer information

Senast uppdaterat

2018-09-06