Title: The Origin and Evolution of Cool Core Clusters: SMBH Outbursts and Mergers

Speaker: Dr. William Forman (Smithsonian Astrophysical Observatory

Time: 15:00pm, November 27, 2025

Location: 3-302, PMO Xianlin Campus

Abstract: Galaxy clusters, as seen in X-ray images, are often divided into two broad classes - those with and without a peaked, bright core centered on a brightest cluster galaxy (BCG)  and those lacking such a bright peak. We present radio/X-ray observations of the rich group/poor cluster centered on IC1262 showing the near complete destruction - extreme sloshing - of a cool core by a merger. The IC1262 system also shows evidence of multiple outbursts from its central supermassive black hole.  We compare the system to the core region of M87 and discuss the nature of AGN feedback in the context of a merging and a non-merging system.