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Oxygen Abundances in Bulge-like Dwarf Stars

Published online by Cambridge University Press:  03 August 2017

Luciana Pompéia ,
Beatriz Barbuy  and
Michel Grenon
Luciana Pompéia
Affiliation:
Instituto Astronômico e Geofísico, USP, 01060-970 São Paulo, Brazil
Beatriz Barbuy
Affiliation:
Instituto Astronômico e Geofísico, USP, 01060-970 São Paulo, Brazil
Michel Grenon
Affiliation:
Geneva Observatory, Chemin des Maillettes 51, CH-1290 Sauverny, Switzerland

Abstract

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High resolution échelle spectra were obtained with the FEROS spectrograph at the 1.5m ESO telescope for 35 nearby bulge-like stars. From Hipparcos data it appears that the turn-off of this population indicates an age of 10–11 Gyr (Grenon 2000).

Oxygen abundances are calculated using the [O I] line at 6300.3 Å. The derived results show an oxygen overabundance for most of our sample stars when compared to their disk counterparts.

Type
Part 1. The Star Clusters of Local Group Galaxies
Information
Symposium - International Astronomical Union , Volume 207: Extragalactic Star Clusters , 2002 , pp. 122 - 125
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

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