Heating of the intracluster medium

Details Heating of the intracluster medium Heating of the intracluster medium

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...354..400j&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 354, May 10, 1990, p. 400-405. Research supported by DFG.

Astronomy and Astrophysics

Astrophysics

8

Astronomical Models, Galactic Clusters, Gravitational Effects, Intergalactic Media, Gravitation Theory, Interacting Galaxies, Landau Damping, Mass Distribution

Scientific paper

The gravitational interaction of the system of galaxies and the ICM are treated by fluctuation theory. Fluctuation theory seems to be more adequate to describe the gravitational interaction than local theories used up to now, because gravitation is a long-range force. Therefore, the dynamical friction and energy transfer depends mainly on the global structure of the gravitational wakes induced by the galaxies in the ICM. The ICM is described hydrodynamically by a nonpolytropic gas. The heating rate is derived as a local quantity on scales characteristic for cluster properties in quasi-linear approximation. The parameter dependence is given explicitly. The Coma cluster is taken as an example to show that mechanical heating by fluctuations may be essential for the structure of the cluster halos and cooling flows.

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