The alpha-effect and current helicity for fast sheared rotators

Details The alpha-effect and current helicity for fast sheared rotators The alpha-effect and current helicity for fast sheared rotators

2005-03-04

arxiv.org/abs/astro-ph/0503095v1

GAFD, 2003, v.97,pp.25-43

Astronomy and Astrophysics

Astrophysics

20 pages, 6 figures

Scientific paper

10.1080/0309192021000053366

We explore the alpha-effect and the small-scale current helicity, for the case of weakly compressible magnetically driven turbulence that is subjected to the differential rotation. No restriction is applied to the amplitude of angular velocity, i.e., the derivations presented are valid for an arbitrary Coriolis number, though the differential rotation itself is assumed to be weak. The expressions obtained are used to explore the possible distributions of alpha-effect and current helicity in convection zones (CZ) of the solar-type stars. The implications of the obtained results to the mean-field dynamo models are discussed.

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