Fig. 10
Angular velocity ratio Ω/Ωc as a function of η, where the uncertainty bars indicate differences for masses and ages in the main-sequence phase. It is shown that Ω/Ωc ≃ 0.95 (red line) identifies the force ratio η ≃ 0.6 at the equator, which implies a 40% under-critical rotation. The ratio V/Vc ≃ 0.95 (red line) corresponds to η ≃ 0.86.
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