8 April 2013 to 3 May 2013
Nordita
Europe/Stockholm timezone

Current-driven Instabilities in Stellar Radiation Zones: linear analysis and nonlinear evolution from DNS

Not scheduled
132:028 (Nordita)

132:028

Nordita

Talk

Speaker

Alfio Bonanno (INAF, Osservatorio Astrofisico di Catania)

Description

The stability of a toroidal field in stellar radiation zone will be discussed by considering the combined effect of rotation, stable stratification and thermal conductivity. It will be shown that the influence of rotation depends on the magnetic configuration of the basic state. If the toroidal field increases sufficiently rapidly with the spherical radius, the instability cannot be suppressed entirely even by a very fast rotation although the strength of the instability can be significantly reduced. Moreover the stable stratification can essentially decrease the growth rate of the instability. Results from DNS will also be presented.

Primary authors

Alfio Bonanno (INAF, Osservatorio Astrofisico di Catania) Vadim Urpin (Catania)

Presentation materials

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