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Wave Generation and Pulsation in Stars with Convective Zones

Published online by Cambridge University Press:  15 February 2018

Wasaburo Unno
Wasaburo Unno*
Affiliation:
Department of Astronomy, University of Tokyo, Bunkyo-ku, Tokyo, JAPAN

Summary

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Wave generation processes are classified in (1) strong and (2) weak, and (a) spontaneous and (b) stimulated processes. Then, the case (2b) operating in convective zones is discussed in detail. Both the dynamical and the thermodynamical coupling between pulsation and convection are formulated by use of the diffusion approximation for the turbulent convection. A mixing length variable with time is thereby introduced. The work integral is transformed so that each of its terms can reveal the mechanism responsible for the stellar stability. An important destabilizing mechanism associated with the convective flux is found to exist among other known mechanisms. The mechanical work is shown to be rather important.

Type
VIII. Waves
Information
International Astronomical Union Colloquium , Volume 38: Problems of Stellar Convection , 1977 , pp. 315 - 324
Copyright
Copyright © 1976

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