A family of stable configurations to model magnetic fields in stellar radiation zones
Abstract
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.
- Publication:
-
Active OB Stars: Structure, Evolution, Mass Loss, and Critical Limits
- Pub Date:
- July 2011
- DOI:
- 10.1017/S1743921311010222
- arXiv:
- arXiv:1009.5584
- Bibcode:
- 2011IAUS..272..178D
- Keywords:
-
- stars: magnetic fields;
- magnetohydrodynamics: MHD;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 2 pages, 1 figure, to be published in the proceedings of IAU 272 "Active OB stars: structure, evolution, mass loss and critical limit", Paris 19-23 July 2010