Properties of the stellar models selected as explained in the text. In all panels different quantities are plotted as function of the model age, the symbol shape depends on the chemical composition, the grey symbols correspond to the primary star, the black ones to the secondary. Top left panel: T_eff for both stars; top-right panel: the integral of the Brunt-Väisälä frequency for the secondary component; bottom left panel: the minimum and maximum excited frequency in the δ Sct domain for both stars (empty and full symbols denote, respectively, the minimum and maximum values); bottom right panel: the minimum and maximum excited frequency in the γ Dor domain for the secondary.