JOFRE, P.; HEITER, U.; SOUBIRAN, C.; BLANCO-CUARESMA, S.; PANCINO, E.; BERGEMANN, M.; CANTAT-GAUDIN, T.; HERNÁNDEZ, J. I. González; HILL, V.; LARDO, C.; DE LAVERNY, P.; LIND, K.; MAGRINI, L.; MASSERON, T.; MONTES, D.; MUCCIARELLI, A.; NORDLANDER, T.; RECIO-BLANCO, A.; SOBECK, J.; SORDO, R.; SOUSA, S. G.; TABERNERO, H.; VALLENARI, A.; VAN ECK, S.; WORLEY, C. C.

doi:10.1051/0004-6361/201322440

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JOFRE, P.
M2A 2014

HEITER, U.

SOUBIRAN, C.
M2A 2014

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Astronomy and Astrophysics - A&A. 2014, vol. 564, p. id.A133

EDP Sciences

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To calibrate automatic pipelines that determine atmospheric parameters of stars, one needs a sample of stars -- ''benchmark stars'' -- with well defined parameters to be used as a reference We provide a detailed documentation of the determination of the iron abundance of the 34 FGK-type benchmark stars selected to be the pillars for calibration of the one billion Gaia stars. They cover a wide range of temperatures, surface gravities and metallicities. Up to seven different methods were used to analyze an observed spectral library of high resolution and high signal-to-noise ratio. The metallicity was determined assuming a value of effective temperature and surface gravity obtained from fundamental relations, i.e. these parameters were known a priori independently from the spectra. We present a set of metallicity values obtained in a homogeneous way for our sample of Benchmark Stars. In addition to this value, we provide a detailed documentation of the associated uncertainties. Finally, we report for the first time a value of the metallicity of the cool giant psi Phe.< Leer menos

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Galaxy Astrophysics

Astrophysics

Solar and Stellar Astrophysics

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Gaia FGK Benchmark Stars - Metallicity

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