Updated abundances of α elements (mean abundance of Si, Mg, and Ti) with the new stellar parameters presented in this work. Thin disc stars (red circles) and thick disc stars (blue stars) are chemically separated by their α content (thick line). The hαmr stars are the prolongation of thick disc stars at [Fe/H] > –0.2 dex. The stars with a different classification with respect to Adibekyan et al. (2011) are shown as black squares.