The Difficulty of the Heating of Cluster Cooling Flows by Sound Waves and Weak Shocks

Details The Difficulty of the Heating of Cluster Cooling Flows by Sound Waves and Weak Shocks The Difficulty of the Heating of Cluster Cooling Flows by Sound Waves and Weak Shocks

2006-10-19

arxiv.org/abs/astro-ph/0610604v2

Astronomy and Astrophysics

Astrophysics

6 pages. To appear in the Proceedings of "Heating vs. Cooling in Galaxies and Clusters of Galaxies", August 2006, Garching (Ge

Scientific paper

We investigate heating of the cool core of a galaxy cluster through the dissipation of sound waves and weak shocks excited by the activities of the central active galactic nucleus (AGN). Using a weak shock theory, we show that this heating mechanism alone cannot reproduce observed temperature and density profiles of a cluster, because the dissipation length of the waves is much smaller than the size of the core and thus the wave energy is not distributed to the whole core.

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