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Dynamics of fossil magnetic fields in massive star interiors

Published online by Cambridge University Press:  12 July 2011

Stéphane Mathis
Stéphane Mathis*
Affiliation:
Laboratoire AIM, CEA/DSM-CNRS-Université Paris Diderot, IRFU/SAp Centre de Saclay, F-91191 Gif-sur-Yvette, France; email: stephane.mathis@cea.fr LESIA, Observatoire de Paris, CNRS, Université Paris Diderot, UPMC, 5 place Jules Janssen, 92190 Meudon, France
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Abstract

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In this talk, I review the different MHD processes, which take place in massive star interiors. First, I describe MHD instabilities, which act on magnetic fields in stellar radiation zones, and the dynamo action in massive stars that give strong indications in favor of a fossil origin of the fields observed at the surface of these stars. Then, I discuss the study of MHD turbulent relaxation processes, which are now examined in stellar interiors, to describe initial conditions for fossil magnetic fields. Finally, I focus on the state of the art of the modeling of the interaction between differential rotation, fossil magnetic field, meridional circulation, and turbulence.

Keywords

magnetohydrodynamics: MHDplasmasstars: magnetic fieldsstars: rotationstars: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 160 - 165
Copyright
Copyright © International Astronomical Union 2011

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