Cosmic-ray heating of cooling flows - A critical analysis

Details Cosmic-ray heating of cooling flows - A critical analysis Cosmic-ray heating of cooling flows - A critical analysis

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...377..392l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 377, Aug. 20, 1991, p. 392-402. Research supported by Alfred P. Sloan Found

Astronomy and Astrophysics

Astrophysics

40

Cooling Flows (Astrophysics), Cosmic Rays, Intergalactic Media, Magnetohydrodynamic Waves, Radiant Heating, Astronomical Models, Diffusion Coefficient, Temperature Distribution, Wave Propagation

Scientific paper

It is shown that a combination of MHD wave-mediated cosmic ray heating and thermal conduction could balance cooling in intracluster media and substantially reduce the rate of inflow. The appropriate system of steady state equations is solved, including a new self-consistent formulation for the cosmic-ray diffusivity. Models which can produce substantial positive temperature gradients in static configurations are found when conduction is reduced by a factor of 10 or more. These models have too-flat thermal pressure profiles compared with observations. It is found that cosmic-ray heating is unlikely either to stabilize positive density perturbations against condensation or to contribute appreciably to the powering of the optical filaments.

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