A simple model for a buoyancy-driven dynamo in accretion discs*

Details A simple model for a buoyancy-driven dynamo in accretion discs* A simple model for a buoyancy-driven dynamo in accretion discs*

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.276.1179r&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 276, Issue 4, pp. 1179-1184.

Astronomy and Astrophysics

Astronomy

9

Accretion, Accretion Discs, Mhd

Scientific paper

A model for the magnetic dynamo process in accretion discs is proposed that does not involve underlying turbulent motions. The key ingredient of the model is the magnetic buoyancy. Combined with Coriolis twist, the buoyant motions result in a back-coupling between azimuthal and radial components of the field. It is shown that for reasonable values of the free parameters of the model all three components of the magnetic field reach a stable saturation state consistent with the basic assumptions underlying the model.

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