M_K0 – Teff diagram of YAR candidate stars in the entire log g range in different metallicity intervals. Red giant stars and red clump YAR candidates with log g < 3.5 are selected on the thick disc sequence to have an age < 4 Gyr and an error on age determination less than 3 Gyr. Dwarfs stragglers candidates with 3.5 < log g < 4.45 are selected to be to the left and to the upper part of the TO (M_K0 = 2.2, T_eff = 5800 [K]). The grey points are stars on the thick disc sequence and no selection on log g nor age.