Magnetic tensions can control the dynamics of accretion disks

Details Magnetic tensions can control the dynamics of accretion disks Magnetic tensions can control the dynamics of accretion disks

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.172..285k&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 172, no. 2, Oct. 1990, p. 285-291.

Statistics

Computation

6

Accretion Disks, Computational Fluid Dynamics, Interstellar Magnetic Fields, Dynamic Models, Galactic Rotation, Magnetic Field Configurations, Magnetohydrodynamics, Molecular Clouds, Quasars

Scientific paper

This paper considers the dynamics of the Galaxy and of accretion disks in general. It is shown that the dominant shear force in accretion disks is likely to be controlled by magnetic tensions. In galactic disks, the magnetic tensions can guarantee the mass-accretion rate required by the quasar phenomenon. It is shown that the inner near-rigidly rotating regions of galactic disks contains supercritical (toroidal) fields which are significantly larger than those in the outer parts, and it is argued that disks with magnetic fields of ram-pressure strength should be violently unstable.

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