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A family of stable configurations to model magnetic fields in stellar radiation zones

Published online by Cambridge University Press:  12 July 2011

Vincent Duez ,
Jonathan Braithwaite  and
Stéphane Mathis
Vincent Duez
Affiliation:
Argelander Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, D-53111 Bonn, Germany, email: vduez@astro.uni-bonn.de, jonathan@astro.uni-bonn.de
Jonathan Braithwaite
Affiliation:
Argelander Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, D-53111 Bonn, Germany, email: vduez@astro.uni-bonn.de, jonathan@astro.uni-bonn.de
Stéphane Mathis
Affiliation:
Laboratoire AIM, CEA/DSM-CNRS-UniversitéParis Diderot, IRFU/SAp Centre de Saclay, F-91191 Gif-sur-Yvette, France, email: stephane.mathis@cea.fr
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Abstract

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We conduct 3D magneto-hydrodynamic (MHD) simulations in order to test the stability of the magnetic equilibrium configuration described by Duez & Mathis (2010). This analytically-derived configuration describes the lowest energy state for a given helicity in a stellar radiation zone. The necessity of taking into account the non force-free property of the large-scale, global field is here emphasized. We then show that this configuration is stable. It therefore provides a useful model to initialize the magnetic topology in upcoming MHD simulations and stellar evolution codes taking into account magneto-rotational transport processes.

Keywords

stars: magnetic fieldsmagnetohydrodynamics: MHD
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. 178 - 179
Copyright
Copyright © International Astronomical Union 2011

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