Speaker
Description
Sloshing motions in relaxed galaxy clusters are believed to play an important role in re-accelerating relativistic particles in radio mini-halos. As shown by recent studies, these motions of the thermal gas can also led to the redistribution of the non-thermal material ejected by the cluster central AGN on broader scale.
In my talk, I will report the results from a recently published study on the low-mass cluster A2657. The LOFAR image shows a peculiar elongated diffuse source close to the cluster center, while the XMM-Netwon data unveil the presence of sloshing motions in the systems. We investigated the origin of this emission by combining the radio and X-ray observations with numerical simulations. Our interpretation is that we are likely observing a radio bubble which is being shredded by the ongoing gas sloshing. I will conclude highlighting another case study, this time in a galaxy group, which demonstrates a similar redistribution of non-thermal components as a consequence of sloshing. Investigating this interplay is important because it probes the seeding of cosmic ray electrons in the ambient medium, which is a process generally invoked to explain the presence of diffuse radio sources across broader extents (mini-halos, halos, relics).
