Oxygen Abundances in Bulge-like Dwarf Stars

Luciana Pompéia, Beatriz Barbuy, Michel Grenon
2002 Symposium - International astronomical union  
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.
doi:10.1017/s0074180900223486 fatcat:aviw7c6mnrafbk72dv5w75mzmu