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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- 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