Solar dynamo model with nonlocal alpha-effect

Details Solar dynamo model with nonlocal alpha-effect Solar dynamo model with nonlocal alpha-effect

2011-03-10

arxiv.org/abs/1103.1944v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

To appear in Astronomy Letters, 10 pages, 5 figures

Scientific paper

The first results of the solar dynamo model that allows for the diamagnetic effect of inhomogeneous turbulence and the nonlocal alpha-effect due to the rise of magnetic loops are discussed. The nonlocal alpha-effect is not subject to the catastrophic quenching related to the conservation of magnetic helicity. Given the diamagnetic pumping, the magnetic fields are concentrated near the base of the convection zone, although the distributed-type model covers the entire thickness of the convection zone. The magnetic cycle period, the equatorial symmetry of the field, its meridional drift, and the polar-to-toroidal field ratio obtained in the model are in agreement with observations. There is also some disagreement with observations pointing the ways of improving the model.

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