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FEROS Abundance Analysis of 21 Bulgelike SMR Stars
Trevisan, Marina; Barbuy, Beatriz; Grenon, M.; Gustafsson, B.; Pompéia, L.
AA(Universidade de São Paulo, IAG, Rua do Matão 1226, São Paulo 05508-900, Brazil), AB(Universidade de São Paulo, IAG, Rua do Matão 1226, São Paulo 05508-900, Brazil), AC(Observatoire de Genève; Chemin des Maillettes 51, CH-1290 Sauverny, Switzerland), AD(Department of Astronomy & Space Physics, Uppsala University, SE-75120 Uppsala, Sweden), AE(Universidade do Vale do Paraíba, São José dos Campos 12244-000, Brazil)
Chemical Abundances in the Universe: Connecting First Stars to Planets, Proceedings of the International Astronomical Union, IAU Symposium, Volume 265, p. 382-383
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stars: abundances, fundamental parameters, atmospheres, late-type - Galaxy: solar neighbourhood
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We analyze a sample of 21 super-metal-rich (SMR) stars, using high-resolution échelle spectra obtained with the Fiber-fed Extended Range Optical Spectrograph at the 1.5m ESO telescope. The metallicities are in the range 0.07 <= [Fe/H] <= 0.45, 3 of them in common with Pompéia et al. (2009). 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, and atmospheric parameters are derived from spectroscopic and photometric determinations. Oxygen abundances of these stars are derived, and [O/Fe] overabundances up to +0.35 are found.

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