AGN Heating of Cooling Flow Clusters: The Failure of Simple Hydrodynamical Models

Details AGN Heating of Cooling Flow Clusters: The Failure of Simple Hydrodynamical Models AGN Heating of Cooling Flow Clusters: The Failure of Simple Hydrodynamical Models

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.5503v&link_type=abstract

American Astronomical Society Meeting 207, #55.03; Bulletin of the American Astronomical Society, Vol. 37, p.1239

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In recent years it has become increasingly clear that AGN (Active Galactic Nuclei) have an impact on large scale structure and galaxy formation. Most work indicates that they can provide enough energy to offset the cooling in the cores of rich, relaxed clusters. We have done a set of high resolution, three dimensional simulations. These show that in the case of purely hydrodynamical AGN jets, although there is enough energy present to offset cooling on average, it is not spatially deposited in a way that can prevent catastrophic cooling of the cluster. We conclude that either some other physics (e.g., plasma transport processes or cosmic ray heating) is relevant for thermalizing the AGN energy output, or the role of AGN heating of cluster gas has been overestimated. This work was partly funded by the Chandra Cycle-5 Theory & Modelling program under grant TM4-5007X.

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