Journal Article

Thermomagnetic instability in hot discs

Edward Liverts, Michael Mond and Vadim Urpin

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 404, issue 1, pages 283-288
Published in print May 2010 | ISSN: 0035-8711
Published online April 2010 | e-ISSN: 1365-2966 | DOI:
Thermomagnetic instability in hot discs

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A linear stability analysis of ionized discs with a temperature gradient and an external axial magnetic field is presented. It is shown that both hydromagnetic and thermomagnetic effects can lead to the amplification of waves and make discs unstable. The conditions under which the instabilities grow are found and the characteristic growth rate is calculated. The regimes at which both the thermomagnetic and magnetorotational instabilities can operate are discussed.

Keywords: accretion, accretion discs; instabilities; MHD

Journal Article.  2862 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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