Gaia FGK benchmark stars and their reference parameters

Paula Jofré1,2* , Ulrike Heiter3†, Sergi Blanco-Cuaresma2 and Caroline Soubiran2
1Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, U.K.
2Laboratoire d’Astrophysique de Bordeaux (UMR 5804), Univ. Bordeaux - CNRS, F-33270, Floirac, France
3Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden

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In this article we summarise on-going work on the so-called Gaia FGK Benchmark Stars. This work consists of the determination of their atmospheric parameters and of the construction of a high-resolution spectral library. The definition of such a set of reference stars has become crucial in the current era of large spectroscopic surveys. Only with homogeneous and well documented stellar parameters can one exploit these surveys consistently and understand the structure and history of the Milky Way and therefore other of galaxies in the Universe.

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Keywords :Milky Way structure - calibration of stellar parameters - reference libraries