David Montes

(short communication)

Title:
Chemical tagging of FGK stars: testing membership to stellar kinematic groups
Abstract:
During the last years our group have undertake several high resolution spectroscopic surveys of nearby FGK stars. A large number of stars have been already observed and we have already determine spectral types, rotational velocities as well as radial velocities, Lithium abundance and several chromospheric activity indicators. We are working now in an homogeneous determination of the fundamental stellar parameters (Teff, log g, metallicity, [Fe/H], and microturbulent velocity) and differential abundance analysis (chemical tagging) of all these stars using an automatic code (StePar) which takes into account the sensibility of iron EWs measured in the spectra. All this information will allowed us to ascribe these stars to moving groups and associations of different ages, and could lead to a better understanding of star formation history in the solar neighborhood discerning between field-like stars (associated with dynamical resonances (bar) or spiral structure)  and young coeval stars (debris of star-forming aggregates in the disk). In addition, all this work and methods will be very useful for preparation for the huge amount of data will be available with Gaia.
(with H.M. Tabernero, J.I. Gonz‡lez Hern‡ndez)