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Mixing by Internal Waves

Published online by Cambridge University Press:  12 April 2016

Josefina Montalbán  and
Evry Schatzman
Josefina Montalbán
Affiliation:
Observatoire de Meudon, 92195 Meudon-Cedex, France
Evry Schatzman
Affiliation:
Observatoire de Meudon, 92195 Meudon-Cedex, France

Extract

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That mixing take place in the radiative zone of many stars, is an event that cannot be forgotten when we try to explain observational results as the lithium abundance in the atmosphere of different stars, its dependence on spectral type, age or rotation velocity... During the last years many processes have been proposed as being responsible of this mixing: overshooting, turbulence induced by rotational instabilities, internal waves, etc... We will consider, following the results obtained by Press (1981), the role of this last mechanism in the transport of lithium to the burning level, not as generators of turbulence (in Press, 1981, and García-López and Spruit, 1991, it is shown that turbulence induced by internal waves decays very quickly inside the radiative zone), but as generators of a diffusive process due to non linear dissipative effects.

Type
III. Input physics for stellar structure
Information
International Astronomical Union Colloquium , Volume 137: Inside the Stars , 1993 , pp. 281 - 283
Copyright
Copyright © Astronomical Society of the Pacific 1993

References

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