Position of the targets in the log T_eff–log g plane (red circles: CoRoT targets, blue triangles: stars in NGC 6633, green squares: benchmark stars). The predictions of evolutionary models, which include rotation-induced mixing (V/V_crit = 0.45 on the zero-age main sequence; ZAMS) and thermohaline mixing, are overplotted (Lagarde et al. 2012). The initial mass of the models in solar units is indicated to the left of each panel. (The tracks are shown with a different linestyle depending on the mass.) The colour of the track indicates the evolutionary phase: red-giant branch (RGB; black), core-He burning (magenta), and asymptotic-giant branch (AGB; cyan). The data are separated into three metallicity domains: theoretical tracks for [Fe/H] = –0.56 and data for stars with [Fe/H] < –0.26 (panel a)); tracks for [Fe/H] = –0.25 and data for stars with –0.26 ≤ [Fe/H] < –0.12 (panel b)); and tracks at solar metallicity (Z = 0.014) and data for stars with [Fe/H] ≥ –0.12 (panel c)). When available, the stellar parameters are those obtained with the gravity constrained to the seismic value (Sect. 6).