Relation between the inferred fraction X_c/X_ini and the convective core mass for stars M_⋆ >  2 M_⊙. The black triangles indicate the average per bin and standard deviation. Two models are shown for 2.4 M_⊙ and ω₀ = 0.05, where the mass is representative of the median stellar mass per bin as shown in the inset. The black colour corresponds to f_CBM = 0.005, the red colour to f_CBM = 0.025.