Modelling magnetised accretion discs

descriptionPublicationkeyboard_double_arrow_right Part of book or chapter of book , Other literature type 06 Apr 2008 English Publisher:Springer Berlin Heidelberg

Authors: A. Brandenburg; C. Campbell;

doi: 10.1007/bfb0105826

Modelling magnetised accretion discs

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Abstract

Some recent results are reviewed that lead us now to believe that accretion discs are basically always magnetised. The main components are Balbus-Hawley and Parker instabilities on the one hand and a dynamo process on the other. A mechanical model for the Balbus-Hawley instability is presented and analysed quantitatively. Three-dimensional simulations are discussed, especially the resulting magnetic field structure. Possibilities of reproducing the field by an αΩ dynamo are investigated, especially its symmetry with respect to the midplane.

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Newcastle University
United Kingdom

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