Precise spectroscopic parameters for solar-type stars with moderate-to-high rotation

Maria Tsantaki (CAUP, Porto, Portugal)

One of the primary objectives of Gaia is to survey billions stars in our Galaxy and build the most precise 3D map of the Milky Way. Automated techniques of spectral analysis are needed to perform a rapid and homogeneous processing of the data with the goal to provide precise and accurate stellar parameters (GAIA-ESO survey). In this context, I will present my recent work on the determination of precise and accurate stellar parameters for FGK stars (Tsantaki et al., 2014). This work is based on the spectral synthesis technique designed to derive parameters for both slowly and fast rotating stars, using the package 'Spectroscopy Made Easy'. We show that our results are on the same scale as the parameters derived from the iron ionization and excitation method. With both techniques, we are able to derive parameters for a very wide group of stars: from giants to dwarfs and from slowly to fast rotating stars. Except for galactic studies, stellar parameters are important for planet searches. Our results have a strong impact on the precise stellar and planetary characterization. We provide updated results for planet-host stars compiled in the catalogue SWEET-Cat.