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An elementary introduction to solar dynamo theory

Choudhuri, Arnab Rai (2007) An elementary introduction to solar dynamo theory. In: Kodai School on Solar Physics, DEC 10-22, 2006, Kodaikanal, INDIA.

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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.

Item Type: Conference Proceedings
Series.: Aip conference proceedings
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 10 Mar 2010 06:37
Last Modified: 10 Mar 2010 06:37
URI: http://eprints.iisc.ac.in/id/eprint/26033

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