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Thermohaline mixing in stars and the long-standing 3He problem

Published online by Cambridge University Press:  09 March 2010

Corinne Charbonnel  and
Nadège Lagarde
Corinne Charbonnel
Affiliation:
Geneva Observatory, University of Geneva, Chemin des Maillettes 51, 1290 Versoix, Switzerland email: [email protected], [email protected] CNRS UMR 5572, Toulouse University 14, av.E.Belin, 31400 Toulouse, France
Nadège Lagarde
Affiliation:
Geneva Observatory, University of Geneva, Chemin des Maillettes 51, 1290 Versoix, Switzerland email: [email protected], [email protected]
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Abstract

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Thermohaline mixing has been recently identified as the dominating process that governs the photospheric composition of low-mass bright giant stars (Charbonnel & Zahn 2007). Here we present the predictions of stellar models computed with the code STAREVOL taking into account this mechanism together with rotational mixing and atomic diffusion. We compare our theorical predictions with recent observations and discuss how the corresponding yields for 3He are compatible with the observed behaviour of this light element in our Galaxy.

Keywords

hydrodynamicsinstabilitiesstars: abundancesevolutionrotationGalaxy: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S265: Chemical Abundances in the Universe: Connecting First Stars to Planets , August 2009 , pp. 205 - 208
Copyright
Copyright © International Astronomical Union 2010

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