Theory of the solar cycle

Details Theory of the solar cycle Theory of the solar cycle

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...74...79s&link_type=abstract

(ESA and European Physical Society, ESLAB Symposium on Physics of Solar Variations, 14th, Scheveningen, Netherlands, Sept. 16-19

Physics

48

Dynamo Theory, Solar Cycles, Solar Magnetic Field, Solar Physics, Convection, Electrical Resistivity, Lorentz Force, Magnetic Flux, Main Sequence Stars, Solar Rotation, Stellar Magnetic Fields, Turbulent Diffusion

Scientific paper

After a review of the properties of kinematic alpha omega-dynamos, a defense is presented of the mean field concept, including turbulent diffusivity, against recent criticism. It is pointed out that the inability to explain the Maunder minimum by the kinetic dynamo theory alone does not invalidate it generally, and attempts to evaluate the coefficients of the mean field induction equation in the case of very large conductivity are discussed. Attention is also given the magnetic cycles of main sequence stars other than the sun, and it is found that, besides rotation, convection zone depth may be the most important parameter in determining the period and amplitude of the stellar cycle. It is recommended that observational programs relating to solar cycle theory should include the solar magnetic and velocity fields, over the entire sun and on all scales.

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