Teff, logg, [Fe/H] and alpha-abundance of SDSS stars from an automated determination algorithm: TGMETalpha.

Details Teff, logg, [Fe/H] and alpha-abundance of SDSS stars from an automated determination algorithm: TGMETalpha. Teff, logg, [Fe/H] and alpha-abundance of SDSS stars from an automated determination algorithm: TGMETalpha.

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..13e..46g&link_type=abstract

Exploiting Large Surveys for Galactic Astronomy, 26th meeting of the IAU, Joint Discussion 13, 22-23 August 2006, Prague, Czech

Astronomy and Astrophysics

Astronomy

Scientific paper

We have developed TGMETalpha in order to determine T[eff], logg, [Fe/H] and [alpha/Fe] for large samples of FGK stars observed at various spectral resolutions. Tests on several hundred echelle spectra of reference stars degraded at low resolution (R=1.000) have provided typical rms precisions of sigma_ T [eff]~150 K, sigma_logg~0.44, sigma_[Fe/H]~0.15 and sigma_[alpha/ Fe]~0.06. We have used TGMETalpha to determine atmospheric parameters and alpha abundances from ~15000 SDSS stellar spectra. Thanks to this very large sample we have investigated the spatial distribution of [alpha/Fe] perpendicular to the galactic disk.

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