Speaker
Description
In this talk, I will present the first homogeneous X-ray and radio study of galaxy clusters using LOFAR and CHEX-MATE XMM observations.
Past studies have shown the presence of radio-X-ray connections in galaxy clusters and used them to derive constraints on cluster energetics and particle (re-)acceleration. However, many aspects of these processes are yet to be understood. With the advent of new radio facilities at low frequencies, robust spatially resolved analyses on clusters are becoming available, providing new crucial information about different acceleration models.
As a first step of a wider systematical study, we analyzed a sample of 18 radio halos observed by LoTSS drawn from the CHEX-MATE project.
I find strong correlations between X-ray and radio brightness in every target. This relation is (almost) always sub-linear indicating a flatter distribution of the non-thermal component. In addition, by studying the varying radio-X relations found, I was able to test a simplified re-acceleration model and to put constraints on some of its parameters.
Finally, I will also present preliminary results of a tentative radio profile rescaling, as usually made for the thermal component of the ICM, searching for a universality of the halos radial profile.
