High-resolution spectroscopic observations of post-asymptotic giant branch candidates from the Edinburgh-Cape Survey
Abstract
High spectral resolution (R~ 40000) and signal-to-noise optical spectra, obtained at the Very Large Telescope (VLT), are presented for three post-asymptotic giant branch (AGB) candidates selected from the Edinburgh-Cape (EC) Faint Blue Object Survey. The stellar atmospheric parameters and chemical compositions, derived using sophisticated non-local thermodynamic equilibrium calculations, reveal that EC 14102-1337 and EC 20068-7324 are both in an evolved post-horizontal branch (HB) evolutionary state. However, EC 11507-2253 is most likely a post-AGB star.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- November 2005
- DOI:
- 10.1111/j.1365-2966.2005.09496.x
- Bibcode:
- 2005MNRAS.363..911L
- Keywords:
-
- stars: abundances;
- stars: AGB and post-AGB;
- stars: atmospheres;
- stars: early-type;
- stars: evolution;
- Galaxy: halo