The space interferometry mission astrometric grid giant star survey. iii. basic stellar parameters for an extended sample

Dmitry Bizyaev, Verne V. Smith, Cunha Katia

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We present results of high-resolution (∼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 Teff, logg, [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]∼-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.

Original languageEnglish (US)
Pages (from-to)1911-1918
Number of pages8
JournalAstronomical Journal
Volume140
Issue number6
DOIs
StatePublished - Dec 2010
Externally publishedYes

Keywords

  • Stars: abundances
  • Stars: atmospheres
  • Stars: fundamental parameters
  • Stars: late-type
  • Stars: rotation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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