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Convective Overshoot as a Source of Helicity

Published online by Cambridge University Press:  12 April 2016

R. L. Jennings
R. L. Jennings*
Affiliation:
D.A.M.T.P., Silver St., Cambridge, CB3 9EW, UK

Abstract

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In order to understand what happens in the Sun when convection overshoots into the radiation zone an idealized model of penetrative convection with rotation is studied. Here we highlight two properties of the model which occur with parameters relevant to the Sun. Firstly rotation allows motions to persist far beneath the convection zone, and secondly the profile of helicity with depth is dominated by a local maxima just beneath the convection zone. This second result has consequences in dynamo theory.

Type
Part I Convection and turbulence as the basis of magnetic activity
Information
International Astronomical Union Colloquium , Volume 130: The Sun and Cool Stars: activity, magnetism, dynamos , 1991 , pp. 62 - 66
Copyright
Copyright © Springer-Verlag 1991

References

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Krause, F. and Radier, K.-H.: 1980, Mean-Field Magnetohydrodynamics and Dynamo Theory, Pergamon Press, Oxford Google Scholar
Priest, E.R.: 1982, Solar Magnetohydrodynamics, Reidel, Dordrecht CrossRefGoogle Scholar