Heating of the ICM Due Fossil Plasma

Details Heating of the ICM Due Fossil Plasma Heating of the ICM Due Fossil Plasma

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xrrc.proce8.04h&link_type=abstract

"X-Ray and Radio Connections (eds. L.O. Sjouwerman and K.K Dyer) Published electronically by NRAO, http://www.aoc.nrao.edu/event

Physics

X-Ray, Radio, Cluster Mergers

Scientific paper

Huge amounts of highly relativistic plasma are emitted into the intracluster medium (ICM) by active galactic nuclei (AGN). This plasma rises buoyantly to the fringes of the cluster. However, disruption due to hydrodynamical instabilities slows down the motion of the plasma. Simultaneously radiative losses cool down the plasma. In the very end the plasma is mixed into the ICM. We investigate the effect of heating the ICM using the effervescent heating model. We apply this to a spherically symmetric cluster model with a cold core in the center and assume a single-fluid ICM. We found that even a small effervescent heat reduces the accretion onto the core. Moreover, the mass deposition rate may be by orders of magnitude smaller than inferred from usual cooling-flow formula.

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