Mathematics – Logic
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1171..284k&link_type=abstract
RECENT DIRECTIONS IN ASTROPHYSICAL QUANTITATIVE SPECTROSCOPY AND RADIATION HYDRODYNAMICS: Proceedings of the International Confe
Mathematics
Logic
Radiative Transfer, Hydrodynamics, Supernovae, Radiative Transfer, Scattering, Hydrodynamics, Supernovae
Scientific paper
As in most astrophysical objects, the thermal properties of accretion disks are controlled by the balance between a heating rate (in this case, dissipation of MHD turbulence) and radiative cooling from a photosphere. Unlike the situation in most astrophysical objects, however, the radiative flux can often be dynamically important as well. Although much progress has been made over the past fifteen years in understanding the dynamics of MHD turbulence in disks and its contribution to angular momentum transport, much less effort has been given to coupling the turbulence to heating and the radiation that results. In this review I report on the results of a long-term program to study this linkage, and its most significant recent result: that contrary to predictions based on phenomenological scaling laws, those portions of accretion disks in which radiation pressure exceeds gas pressure (a common circumstance in disks around black holes and neutron stars) are in fact thermally stable.
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