Journal
ASTRONOMICAL JOURNAL
Volume 140, Issue 6, Pages 1911-1918Publisher
IOP Publishing Ltd
DOI: 10.1088/0004-6256/140/6/1911
Keywords
stars: abundances; stars: atmospheres; stars: fundamental parameters; stars: late-type; stars: rotation
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Funding
- JPL
- NASA [99-04-OSS-058]
- NSF
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We present results of high-resolution (similar to 55000) spectral observations of 830 photometrically pre-selected candidate red giants in the magnitude range of V = 9-12. We develop a pipeline for automated determination of the stellar atmospheric parameters from these spectra and estimate T-eff, log g, [Fe/H], microturbulence velocity, and projected rotational velocities, v sin i, for the stars. The analysis confirms that the candidate selection procedure yielded red giants with very high success rate. We show that most of these stars are G and K giants with slightly subsolar metallicity ([Fe/H]similar to -0.3 dex). An analysis of Mg abundances in the sample results in consistency of the [Mg/Fe] vs [Fe/H] trend with published results.
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