VizieR Online Data Catalog: Spectroscopy of RGB stars in ω Centauri (An+, 2017)
Abstract
We selected spectroscopic targets among RGB stars in ω Cen based on a BV color-magnitude diagram (CMD) of Rey et al. (2004, J/AJ/127/958). We collected medium-resolution spectra using the Blanco 4 m telescope equipped with Hydra at the Cerro Tololo Inter-American Observatory (CTIO). The Hydra is a fiber-fed multi-object spectrograph with 138 large optical fibers, each of which has a ~300 μm diameter or a ~2" aperture on a focal plane. We observed ω Cen in 11 different fiber configurations on UT 2005 May 27 and 28. In this study, we present spectroscopic parameters of 712 stars (including cluster non-members) for which there exist at least one spectrum, with a signal-to-noise ratio (S/N) equal to or greater than 52 per resolution elements at 4500=<λ(Å)=<5500.
(1 data file).- Publication:
-
VizieR Online Data Catalog
- Pub Date:
- July 2018
- DOI:
- 10.26093/cds/vizier.51540150
- Bibcode:
- 2018yCat..51540150A
- Keywords:
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- Clusters: globular;
- Stars: giant;
- Spectroscopy;
- Abundances;
- Effective temperatures;
- Radial velocities