Magnetic Field Generation in Fully Convective Rotating Spheres | Zendy

Wolfgang Dobler | Zendy; M. Stix | Zendy; Axel Brandenburg | Zendy

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Magnetic Field Generation in Fully Convective Rotating Spheres

Author(s) -

Wolfgang Dobler,

M. Stix,

Axel Brandenburg

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/498634

Subject(s) - physics , equator , dynamo , magnetic field , magnetohydrodynamic drive , field (mathematics) , spheres , convection , magnetohydrodynamics , amplitude , mechanics , dynamo theory , classical mechanics , optics , latitude , astronomy , mathematics , quantum mechanics , pure mathematics

Magnetohydrodynamic simulations of fully convective, rotating spheres withvolume heating near the center and cooling at the surface are presented. Thedynamo-generated magnetic field saturates at equipartition field strength nearthe surface. In the interior, the field is dominated by small-scale structures,but outside the sphere by the global scale. Azimuthal averages of the fieldreveal a large-scale field of smaller amplitude also inside the star. Theinternal angular velocity shows some tendency to be constant along cylindersand is ``anti-solar'' (fastest at the poles and slowest at the equator).Comment: 12 pages, 11 figures, 2 tables, to appear in the 10 Feb issue of Ap

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