An Elementary Introduction to Solar Dynamo Theory

Details An Elementary Introduction to Solar Dynamo Theory An Elementary Introduction to Solar Dynamo Theory

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..919...49c&link_type=abstract

KODAI SCHOOL ON SOLAR PHYSICS. AIP Conference Proceedings, Volume 919, pp. 49-73 (2007).

Physics

1

Electric And Magnetic Fields, Solar Magnetism, Sun Spots, Solar Cycles

Scientific paper

The cyclically varying magnetic field of the Sun is believed to be produced by the hydromagnetic dynamo process. We first summarize the relevant observational data pertaining to sunspots and solar cycle. Then we review the basic principles of MHD needed to develop the dynamo theory. This is followed by a discussion how bipolar sunspots form due to magnetic buoyancy of flux tubes formed at the base of the solar convection zone. Following this, we come to the heart of dynamo theory. After summarizing the basic ideas of a turbulent dynamo and the basic principles of its mean field formulation, we present the famous dynamo wave solution, which was supposed to provide a model for the solar cycle. Finally we point out how a flux transport dynamo can circumvent some of the difficulties associated with the older dynamo models.

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