Convective core mass as a function of total mass for ZAMS models (full line) and models for the central hydrogen mass fractions of X_c = 0.35 (red) and X_c = 0.1 (black) when considering low (dashed), moderate (dashed-dot), and high (dotted) levels of CBM according to the ranges in Table 2. The sample stars are added with color coding according to their v_eq/v_cirt (left) and their X_c (right).