log (N/C) as a function of projected rotational velocity (vsin i) for the sample stars. Left: evolutionary tracks are labelled by initial mass (initial rotation v_init = 0.4v_crit). We overplot in blue, green, and red the parts of the tracks that correspond to the minimum and maximum value of log g as measured for the dwarfs, giants, and supergiants, respectively. Right: models with a range of initial rotation v_init = 0.1v_crit, 0.2v_crit, and 0.4v_crit, and initial masses of 15 M_⊙ and 40 M_⊙. In both panels, a horizontal scaling corresponding to a factor π/4 to account for an average projection effect has been applied to the theoretical curves. The horizontal dotted line indicates the baseline N/C for the SMC used in the models.