Effects of fluctuation on alpha-omega dynamo models

Details Effects of fluctuation on alpha-omega dynamo models Effects of fluctuation on alpha-omega dynamo models

2007-08-23

arxiv.org/abs/0708.3210v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures

Scientific paper

10.1111/j.1745-3933.2007.00385.x

We analyse the role of a fluctuating alpha-effect in alpha-omega dynamo models, and show that there is a mechanism for magnetic field generation, valid at large scale separation, deriving from the interaction of mean shear and a fluctuating alpha-effect. It is shown that this effect can act as a dynamo even in the absence of a mean alpha-effect, and that the timescale for dynamo waves is strongly affected by the presence of fluctuations.

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