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Oscillatory convection in strong magnetic fields and origin of active regions

Published online by Cambridge University Press:  14 August 2015

S. I. Syrovatsky  and
Y. D. Zhugzhda
S. I. Syrovatsky
Affiliation:
Physical Institute of Lebedev, Moscow, U.S.S.R.
Y. D. Zhugzhda
Affiliation:
Institute of Earth Magnetism, Ionosphere and Propagation of Radio-Waves, Academy of Sciences, Moscow, U.S.S.R.

Abstract

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The convection in a compressible inhomogeneous conducting fluid in the presence of a vertical uniform magnetic field has been studied. It is shown that a new mode of oscillatory convection occurs, which exists in arbitrarily strong magnetic fields. The convective cells are stretched along the magnetic field, their horizontal dimensions are determined by radiative cooling. Criteria for convective instability in a polytropic atmosphere are obtained for various boundary conditions in the case when the Alfvén velocity is higher compared with the velocity of sound.

The role of oscillatory convection in the origin of sunspots and active regions is discussed.

Type
Part II: Theoretical Aspects
Information
Symposium - International Astronomical Union , Volume 35: Structure and Development of Solar Active Regions , 1968 , pp. 127 - 130
Copyright
Copyright © Reidel 1968 

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