Magnetic dynamo action in astrophysical turbulence

Details Magnetic dynamo action in astrophysical turbulence Magnetic dynamo action in astrophysical turbulence

2008-09-03

arxiv.org/abs/0809.0720v2

Astrophys.J.697:1433-1438,2009

Astronomy and Astrophysics

Astrophysics

13 pages, 3 figures, minor changes are made to match the published version

Scientific paper

10.1088/0004-637X/697/2/1433

We investigate the structure of magnetic field amplified by turbulent velocity fluctuations, in the framework of the kinematic Kazantsev-Kraichnan model. We consider Kolmogorov distribution of velocity fluctuations, and assume that both Reynolds number and magnetic Reynolds number are very large. We present the full numerical solution of the model for the spectra and the growth rates of magnetic fluctuations. We consider astrophysically relevant limits of large and small magnetic Prandtl numbers, and address both helical and nonhelical cases.

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