A statistical investigation of the radio emission of clusters : role of AGNs

TL;DR

This paper conducts a statistical analysis of radio emissions from galaxy clusters to understand the role of AGNs and diffuse ICM emission, linking radio luminosity to cluster mass and gas physics.

Contribution

It introduces a large-scale statistical approach to analyze radio emissions in galaxy clusters, focusing on the impact of AGNs and diffuse ICM emission.

Findings

Radio luminosity correlates with cluster mass.

AGNs significantly contribute to cluster radio emission.

Diffuse ICM emission impacts cluster evolution.

Abstract

Radio emission in the direction of galaxy clusters is due to the individual emission of AGNs, and to the diffuse non-thermal emission of the intracluster medium (ICM). The population of AGNs in clusters is correlated to the overall halo properties, and likely impacts their evolutions. In order to better understand this connection (which will also leads to constraints on the non-thermal ICMemission for lower mass systems), we are conducting a statistical analysis of the radio emission in the direction of a large number of X-ray clusters. By means of their stacked radio emission, we are investigating the radio luminosities in clusters of galaxies with respect to their mass, with the goal to better understand their link to and their imprint on the intra-cluster gas physics.