Date(s) - 05/03/2008
3:20 pm - 4:20 pm
Title: AGN Feedback in Clusters and Galaxies
Speaker: Dr. Brian McNamara
Institute: University of Waterloo
Location: ABB 102
The gaseous atmospheres of galaxies and clusters serve as repositories for the energy output from AGN over cosmic time. X-ray observations have shown that cooling of the dense, keV gas in the cores of galaxies and clusters is strongly suppressed, and feedback from supermassive black holes is a likely heating agent. The energy pouring out of the nuclei of central cluster galaxies often rivals that of quasars. Unlike quasars, their vast power output is channeled into mechanical energy rather than light.