Teff, logg, [Fe/H] and alpha-abundance of SDSS stars from an automated determination algorithm: TGMETalpha.
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
Girard, P. et al.
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2006