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Li survey in giant stars : probing non-standard stellar physics

Published online by Cambridge University Press:  23 April 2010

N. Lagarde ,
C. Charbonnel ,
G. Jasniewicz ,
P. North ,
M. Shetrone ,
J. Hollek  and
V. V. Smith
N. Lagarde
Affiliation:
Geneva Observatory, University of Geneva, Switzerland email: [email protected]
C. Charbonnel
Affiliation:
Geneva Observatory, University of Geneva, Switzerland email: [email protected] CNRS UMR 5572, Université de Toulouse, France
G. Jasniewicz
Affiliation:
Université de Montpellier II, CNRS/UM2 UMR 5024, France
P. North
Affiliation:
Laboratoire d'astrophysique, Ecole Polytechnique Fédérale de Lausanne, Switzerland
M. Shetrone
Affiliation:
University of Texas, McDonald Observatory, USA
J. Hollek
Affiliation:
University of Texas, McDonald Observatory, USA
V. V. Smith
Affiliation:
National Optical Astronomy Observatory, Tucson, USA
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Abstract

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Lithium has long been known to be a good tracer of non-standard mixing processes occurring in stellar interiors. Here we present the results of a large survey aimed at determining the surface Li abundance in a sample of about 800 giant (RGB and AGB) stars with accurate Hipparcos parallaxes. We compare the observed Li behaviour with that predicted by stellar models including rotation and thermohaline mixing.

Keywords

HydrodynamicsinstabilitiesStars: abundancesevolutionrotation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S268: Light Elements in the Universe , November 2009 , pp. 423 - 424
Copyright
Copyright © International Astronomical Union 2010

References

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