Radio Galaxies in Cooling Cores: Insights from a Complete Sample

Details Radio Galaxies in Cooling Cores: Insights from a Complete Sample Radio Galaxies in Cooling Cores: Insights from a Complete Sample

2006-12-04

arxiv.org/abs/astro-ph/0612111v1

Astronomy and Astrophysics

Astrophysics

To appear in proceeding of "Heating and Cooling in Galaxies and Clusters of Galaxies" (August 2006, MPE/Garching). 6 pages, ne

Scientific paper

We have observed a new, complete, cooling-core sample with the VLA, in order to understand how the massive black hole in the central galaxy interacts with the local cluster plasma. We find that every cooling core is currently being energized by an active radio jet, which has probably been destabilized by its interaction with the cooling core. We argue that current models of cooling-core radio galaxies need to be improved before they can be used to determine the rate at which the jet is heating the cooling core. We also argue that the extended radio haloes we see in many cooling-core clusters need extended, in situ re-energization, which cannot be supplied solely by the central galaxy.

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