GMRT radio halo survey in galaxy clusters at<i>z</i>= 0.2–0.4

Abstract

Aims. We present the results of the GMRT cluster radio halo survey. The main purposes of our observational project are to measure what fraction of massive galaxy clusters in the redshift range –0.4 host a radio halo, and to constrain the expectations of the particle re-acceleration model for the origin of the non-thermal radio emission.