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Gravity wave generation by large scale bubbles

Published online by Cambridge University Press:  03 August 2017

Axel Brandenburg
Axel Brandenburg*
Affiliation:
Hamburger Sternwarte, Gojenbergsweg 112, D-2050 Hamburg 80, West Germany

Abstract

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The response of an isothermal atmosphere to small disturbances in entropy is studied taking compressible effects fully into account. The method of Green's functions is applied to solve the linearized hydrodynamic equations by Fourier transformation. A bubble may be created by perturbing the entropy within a finite volume. At first Lamb waves will be then emitted radially and the bubble undergoes a series of Brunt-Väisälä oscillations. We find that horizontally propagating waves are generated only by large bubbles “exceeding a radius of about ten pressure scale heights, whereas smaller bubbles lead to motions propagating principally in the vertical direction.

Type
Chapter 6: Excitation and Damping of Solar and Stellar Oscillations
Information
Symposium - International Astronomical Union , Volume 123: Advances In Hello- and Asteroseismology , 1988 , pp. 383 - 386
Copyright
Copyright © Reidel 1988 

References

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