Effects of the ΩΓ limit on the 1000, 5000, and 9000 M_⊙ models at 0.1 v/v_crit. Top: Evolution of the surface spin parameter Ω/Ω_crit vs. Eddington factor Γ. The horizontal dashed line marks Γ = 0.639, above which the ΩΓ-limit (Eq. (7)) becomes relevant. Bottom: ratio of radiatively reduced to classical critical velocity, v_crit, 2/v_crit, 1, vs. stellar age. The decline from the initial values of ∼0.69, 0.40, and 0.32 to minima of ∼0.38, 0.25, and 0.19 quantifies the suppression of break-up speed by radiative acceleration. The shaded zones represent the age where the ΩΓ-limit is active.