Metallicity and Kinematics of Thick Disc Stars at Intermediate Galactic Latitudes

摘要

Using the pipeline presented in Kordopatis et al. (2011a), we analysed 700 stellar spectra of targets towards intermediate galactic latitudes, in order to test the formation scenarios of the thick disc of the Milky Way. We found that the properties of the thick disc far from the solar neighbourhood are similar to the ones that have been measured locally by previous studies and that the thick disc is characterised by only one stellar population of constant scalelength and scaleheight, in contradiction with a thick disc mainly formed by radial migration mechanisms.