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Lithium abundances in Bulge-like SMR stars.

Authors :
Barbuy, Beatriz
Trevisan, M.
Gustafsson, B.
Eriksson, K.
Grenon, M.
Pompéia, L.
Source :
Proceedings of the International Astronomical Union; 11/02/2009, Vol. 5 Issue S268, p325-326, 2p
Publication Year :
2009

Abstract

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. [ABSTRACT FROM PUBLISHER]

Details

Language :
English
ISSN :
17439213
Volume :
5
Issue :
S268
Database :
Complementary Index
Journal :
Proceedings of the International Astronomical Union
Publication Type :
Academic Journal
Accession number :
57126155
Full Text :
https://doi.org/10.1017/S1743921310004308