MHD simulations of plasma heating in clusters of galaxies

Details MHD simulations of plasma heating in clusters of galaxies MHD simulations of plasma heating in clusters of galaxies

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006an....327..605a&link_type=abstract

Astronomische Nachrichten, Vol.327, Issue 5/6, p.605

Astronomy and Astrophysics

Astronomy

2

Galaxies: Magnetic Fields, Cooling Flows, Magnetohydrodynamics (Mhd), Plasmas, Conduction

Scientific paper

We present the results of 2-D magnetohydrodynamic (MHD) simulations of the plasma heating in clusters of galaxies. Both radiative cooling and anisotropic heat conduction are included. Magnetic turbulence is excited by the motion of gravitating clumps of the dark matter. These simulations enable us to study the thermal stability of a cluster core subjecting to turbulent magnetic fields. We found that moving clumps create hot regions ahead of them and that hot and cool plasmas coexist because magnetic fields suppress the heat conduction. Numerical results indicate that heat conduction from the hot region suspends the decrease of the temperature in the core for more than 1 Gyr.

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