Active galactic nucleus feedback in clusters of galaxies
Elizabeth L. Blanton (1), T. E. Clarke (2), Craig L. Sarazin (3),, Scott W. Randall (4), and Brian R. McNamara (4, 5, 6), ((1) BU, (2) NRL, (3), UVa, (4) CfA, (5) U. Waterloo, (6) Perimeter Inst. for Theoretical Physics)
TL;DR
This paper reviews how observations from the Chandra X-ray Observatory have advanced understanding of AGN feedback mechanisms in galaxy clusters, highlighting how AGN activity influences gas cooling and star formation suppression.
Contribution
It synthesizes recent observational evidence of AGN heating processes like shocks and bubbles, emphasizing their role in regulating intracluster gas cooling.
Findings
AGN feedback suppresses cooling flows in galaxy clusters.
Multiple mechanisms like shocks and bubbles contribute to gas heating.
AGN activity correlates with reduced star formation in cluster centers.
Abstract
Observations made during the last ten years with the Chandra X-ray Observatory have shed much light on the cooling gas in the centers of clusters of galaxies and the role of active galactic nucleus (AGN) heating. Cooling of the hot intracluster medium in cluster centers can feed the supermassive black holes found in the nuclei of the dominant cluster galaxies leading to AGN outbursts which can reheat the gas, suppressing cooling and large amounts of star formation. AGN heating can come in the form of shocks, buoyantly rising bubbles that have been inflated by radio lobes, and the dissipation of sound waves.
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