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Lithium Abundance in Late-Type Stars

Published online by Cambridge University Press:  25 May 2016

L Pompéia ,
B Barbuy  and
M. Grenon
L Pompéia
Affiliation:
Instituto Astron⊚mico e Geofísico - USP. Av. Miguel Stefano, 4200, CEP 04301-904, São Paulo - Brazil
B Barbuy
Affiliation:
Instituto Astron⊚mico e Geofísico - USP. Av. Miguel Stefano, 4200, CEP 04301-904, São Paulo - Brazil
M. Grenon
Affiliation:
Observatoire de Genève, CH-1290 Sauverny, Suisse

Abstract

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We have a list of nearby bulge-like turnoff stars with metallicities in the range −0.3 ≤ [Fe/H] ≤ +0.6, for which we have the absolute magnitude from Hipparcos, Geneva photometry (therefore temperature and metallicity), and radial velocity from Coravel (Grenon 1990, 1997). From Hipparcos data, the turnoff of these field stars indicate an age of 10-11 Gyr, which would be the age of the most metal-rich component of the bulge.

We obtained high resolution échelle spectra with FEROS, with the aim to carry out detailed analysis of these stars. In this paper we present the Li abundance for 40 of these metal-rich and old dwarf stars, as a function of their temperatures.

Type
4. Lithium Abundances
Information
Symposium - International Astronomical Union , Volume 198: The Light Elements and their Evolution , 2000 , pp. 368 - 369
Copyright
Copyright © Astronomical Society of the Pacific 2000 

References

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