International audience
Gaia is a space mission currently measuring the five astrometric parameters as well as spectrophotometry of at least 1 billion stars to G = 20.7 mag with unprecedented precision. The sixth parameter in phase space (radial velocity) is also measured thanks to medium-resolution spectroscopy being obtained for the 150 million brightest stars....
The metallicity of the Gaia FGK benchmark stars is determined by combining 6 methods. The Tables indicate the iron abundance and equivalent width determined for each star, iron line and method. (5 data files).