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Lithium abundances in Bulge-like SMR stars

Published online by Cambridge University Press:  23 April 2010

Beatriz Barbuy ,
M. Trevisan ,
B. Gustafsson ,
K. Eriksson ,
M. Grenon  and
L. Pompéia
Beatriz Barbuy
Affiliation:
Universidade de São Paulo, Brazil email: barbuy@astro.iag.usp.br
M. Trevisan
Affiliation:
Universidade de São Paulo, Brazil email: barbuy@astro.iag.usp.br
B. Gustafsson
Affiliation:
Uppsala Universitet, Sweden
K. Eriksson
Affiliation:
Uppsala Universitet, Sweden
M. Grenon
Affiliation:
Observatoire de Genève, Switzerland
L. Pompéia
Affiliation:
Universidade do Vale do Paraíba, Brazil
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Abstract

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We analyze a sample of 21 super-metal-rich (SMR) stars, using high-resolution échelle spectra obtained with the FEROS Spectrograph at the 1.5m ESO telescope. The metallicities are in the range 0.15 < [Fe/H] < 0.5, 3 of them in common with Pompéia et al. (2002). Geneva photometry, astrometric data from Hipparcos, and radial velocities from CORAVEL are available for these stars. The peculiar kinematics suggests the thin disk close to the bulge as the probable birthplace of these stars (Grenon 1999). From Hipparcos data, it appears that the turnoff of this population indicates an age of 10-11 Gyr (Grenon 1999). Detailed analysis of the sample stars is carried out. Lithium abundances of these stars were derived, and their behaviour with effective temperature is shown.

Keywords

Stars: abundancesformation - Galaxy: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S268: Light Elements in the Universe , November 2009 , pp. 325 - 326
Copyright
Copyright © International Astronomical Union 2010

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