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Acoustic Wave Generation in Vertical Magnetic Fields

Published online by Cambridge University Press:  19 July 2016

H.S. Yun  and
J.W. Lee
H.S. Yun
Affiliation:
Astronomy Department Seoul National University Seoul 151-742, Korea
J.W. Lee
Affiliation:
Astronomy Department Seoul National University Seoul 151-742, Korea

Abstract

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We extended Stein's hydrodynamic theory of acoustic wave generation to accommodate the effect of a vertically uniform magnetic field. It is shown that in the presence of a uniform vertical field with pure horizontal field fluctuations the acoustic waves are produced both from a non-magnetic monopole source of the Reynolds stress and by the magnetic field fluctuations. The computed acoustic flux is found to be confined to the topmost of the spot's convection zone with a small range of depth.

Type
VI. Chromospheric and Coronal Heating
Information
Symposium - International Astronomical Union , Volume 142: Basic Plasma Processes on the Sun , 1990 , pp. 264 - 265
Copyright
Copyright © Kluwer 1990 

References

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Stein, Robert F. (1967) “Generation of acoustic and gravity waves by turbulence in an isothermal stratified atmosphere” Solar Physics 2, 385.Google Scholar
Unno, W. (1964) Transaction I.A.U. XII B Academic Press, New York, p555 Google Scholar
Yun, H.S. (1968) “Theoretical Sunspot Models” Indiana University.Google Scholar