Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2010-01-04
MNRAS 404 Issue 1 (2010) 283-288
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
6 pages, 1 figure, accepted for the publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2010.16271.x
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.
Liverts Edward
Mond Michael
Urpin Vadim
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