Other
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1201..358p&link_type=abstract
THE MONSTER'S FIERY BREATH: FEEDBACK IN GALAXIES, GROUPS, AND CLUSTERS. AIP Conference Proceedings, Volume 1201, pp. 358-362 (2
Other
Intergalactic Matter, Magnetohydrodynamics, Magnetic Field Effects, X-Rays, Intergalactic Matter, Quasar Absorption And Emission-Line Systems, Lyman Forest, Magnetohydrodynamics And Plasmas, Electric And Magnetic Fields, X-Ray
Scientific paper
We demonstrate that the intracluster medium (ICM) of clusters of galaxies is everywhere convectively unstable to one of two instabilities driven by anisotropic thermal conduction along magnetic field lines, despite having stably stratified entropy gradients. Outside any cooling core, the magnetothermal instability (MTI) reorients magnetic fields to be largely radial, enhancing the effective radial thermal conductivity. In galaxy clusters with a cooling core, the heat-flux-driven buoyancy instability (HBI) has the opposite effect. By reducing the effective radialB thermal conductivity, the HBI can hasten the onset of a cooling catastrophe for low central entropy clusters.
Parrish Ian J.
Quataert Eliot
Sharma Pankaj
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