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Thermohaline mixing in stars : solving the long-standing 3He problem

Published online by Cambridge University Press:  23 April 2010

Corinne Charbonnel  and
Nadège Lagarde
Corinne Charbonnel
Affiliation:
Geneva Observatory, University of Geneva, Chemin des Maillettes 51, 1290 Versoix, Switzerland email: Corinne.Charbonnel@unige.ch, Nadege.Lagarde@unige.ch 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: Corinne.Charbonnel@unige.ch, Nadege.Lagarde@unige.ch
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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 2007a). Here we present the predictions of stellar models computed with the code STAREVOL that takes 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 S268: Light Elements in the Universe , November 2009 , pp. 441 - 446
Copyright
Copyright © International Astronomical Union 2010

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