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Solar Activity

Zirin, H. (1992) Solar Activity. In: The Sun: A Laboratory for Astrophysics. NATO ASI Series. Series C. No.373. Springer Netherlands , Dordrecht, pp. 449-463. ISBN 9789401052276.

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The magnetic cycle lasts 22 years, reversing polarity in each 11-year half. Spots reach the surface in emerging flux regions (EFR) and grow in complexity. Ephemeral regions bring considerable flux to the surface, but play no great role. Diffusion models of the cycle are discussed, but the low observed diffusion constant makes them a poor fit to reality. We then turn to the properties of active regions, especially highly active regions producing many flares, and we discuss the properties of those flares.

Item Type:Book Section
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Additional Information:© Springer Science+Business Media Dordrecht 1992.
Subject Keywords:Solar Physics; Sunspot Cycle; Flux Emergence; Spot Group; Flux Loop
Series Name:NATO ASI Series. Series C
Issue or Number:373
Record Number:CaltechAUTHORS:20201009-102843018
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105951
Deposited By: George Porter
Deposited On:09 Oct 2020 21:11
Last Modified:16 Nov 2021 18:48

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