A model of hydromagnetic turbulence in accretion disks

Details A model of hydromagnetic turbulence in accretion disks A model of hydromagnetic turbulence in accretion disks

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasj...45..103k&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 45, no. 1, p. 103-112.

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Accretion Disks, Astronomical Models, Magnetohydrodynamic Turbulence, Computational Astrophysics, Interstellar Magnetic Fields, Stellar Coronas, Turbulence Models

Scientific paper

A model of hydromagnetic turbulence in radiation pressure dominated disks is presented. This is a kind of second-order closure modeling. The effects of the escape of the magnetic field from a disk are taken into account phenomenologically. The results show that the so-called alpha-value of the viscosity has a reasonable value for moderate values of the dimensionless parameters which characterize the turbulence, and depends weakly on beta (= p(g)/(p(g) + p(r)), where p(g) and p(r) are, respectively, the gas and radiation pressure. This dependence of alpha on beta is the result of the escape of the magnetic field from the disk.

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