Premium
How can α 2‐dynamos generate axisymmetric magnetic fields?
Author(s) -
Elstner D.,
Rüdiger G.
Publication year - 2007
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200710864
Subject(s) - dynamo , rotational symmetry , anisotropy , physics , thermal diffusivity , magnetic diffusivity , dynamo theory , magnetic field , convection , convective flow , field (mathematics) , mechanics , classical mechanics , astrophysics , optics , thermodynamics , mathematics , quantum mechanics , pure mathematics
Inspired by a recently observed axisymmetric field in a fully convective star we investigate the influence of an anisotropic diffusivity on the dynamo. We find that with reasonable assumptions for the anisotropy of the diffusivity and the α ‐effect the preference of axisymmetric modes is achieved. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)