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arXiv · 1101.3115

Alleviation of catastrophic quenching in solar dynamo model with nonlocal alpha-effect

L. L. Kitchatinov·S. V. Olemskoy
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Abstract

The nonlocal alpha-effect of Babcock-Leighton type is not prone to the catastrophic quenching due to conservation of magnetic helicity. This is shown with a dynamo model, which jointly applies the nonlocal alpha-effect, the diamagnetic pumping, and dynamical equation for the magnetic alpha-effect. The same model shows catastrophic quenching when the alpha-effect is changed to its local formulation. The nonlocal model shows the preferred excitation of magnetic fields of dipolar symmetry, which oscillate with a period of about ten years and have a toroidal-to-polar fields ratio of about a thousand.

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L. L. Kitchatinov, S. V. Olemskoy. 2011-01-17. Alleviation of catastrophic quenching in solar dynamo model with nonlocal alpha-effect. https://doi.org/10.1002/asna.201011549

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