Abstract

The relation between mini-halos and the feedback of supermassive black holes

Annabelle Richard-Laferrière (Université de Montréal )

Julie Hlavacek-Larrondo

Radio mini-halos are diffuse radio sources found in galaxy clusters. The radio emission is however located too far from the relativistic source (the Active Galatic Nucleus - AGN), implying that the particles must be reacceleration in situ. Only a few mini-halos have been discovered so far. We report the discovery of a radio mini-halo in PKS 0745-19, a massive cluster of galaxies located at z=0.1028. We also report on a review of scientific literature of all known mini-halos (28 in total). We have compared several properties of the radio mini-halos to those of the cluster and find evidence of new, previously unknown correlations between the radio mini-halo power and BCG radio power, as well as the physical size of the radio mini-halo and the BCG radio power. 

Mode of presentation: poster