English

Magnetic field generation in fully convective rotating spheres

Astrophysics 2007-05-23 v2

Abstract

Magnetohydrodynamic simulations of fully convective, rotating spheres with volume heating near the center and cooling at the surface are presented. The dynamo-generated magnetic field saturates at equipartition field strength near the surface. In the interior, the field is dominated by small-scale structures, but outside the sphere by the global scale. Azimuthal averages of the field reveal a large-scale field of smaller amplitude also inside the star. The internal angular velocity shows some tendency to be constant along cylinders and is ``anti-solar'' (fastest at the poles and slowest at the equator).

Keywords

Cite

@article{arxiv.astro-ph/0410645,
  title  = {Magnetic field generation in fully convective rotating spheres},
  author = {W. Dobler and M. Stix and A. Brandenburg},
  journal= {arXiv preprint arXiv:astro-ph/0410645},
  year   = {2007}
}

Comments

12 pages, 11 figures, 2 tables, to appear in the 10 Feb issue of ApJ