Log T_eff vs. log g diagram for the Georgy et al. (2013) evolutionary tracks with Z = 0.014, M = 3 M_⊙, 4 M_⊙, and ω = 0.3 (solid lines) and 0.6 (dashed lines). Stars in the sample with −0.1 < [Fe/H]< 0.1 and M = 3.5 M_⊙, 4 M_⊙ are shown with error bars. Upper panel: colour index indicates the equatorial velocity for evolutionary tracks and the observed v sin i for sample stars. Lower panel: colour index indicates the [N/C] abundance ratio.