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

Lagarde, N. ; Charbonnel, C. ; Jasniewicz, G. ; North, P. ; Shetrone, M. ; Hollek, J. ; Smith, V. V.

In: Proceedings of the International Astronomical Union, 2009, vol. 5, no. S268, p. 423-424

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    Titre
    • Li survey in giant stars
      probing non-standard stellar physics
    Auteur
    • Lagarde, N.. Geneva Observatory, University of Geneva, Switzerland email: Nadege.Lagarde@unige.ch
    • Charbonnel, C.. Geneva Observatory, University of Geneva, Switzerland email: Nadege.Lagarde@unige.ch
    • Jasniewicz, G.. Université de Montpellier II, CNRS/UM2 UMR 5024, France
    • North, P.. Laboratoire d'astrophysique, Ecole Polytechnique Fédérale de Lausanne, Switzerland
    • Shetrone, M.. University of Texas, McDonald Observatory, USA
    • Hollek, J.. University of Texas, McDonald Observatory, USA
    • Smith, V. V.. National Optical Astronomy Observatory, Tucson, USA
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Proceedings of the International Astronomical Union, 2009, vol. 5, no. S268, p. 423-424. Cambridge University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:302330
    Summary
    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