Galactic OB-star HR-diagram data imply a constant core overshoot α_ov ≈ 0.33 for 12–40 M_sun, yielding larger helium cores than standard prescriptions.
year = 1971, month = jul
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You're Gonna Need a Bigger Core: Calibrating Massive Star Models against Galactic OB-type Stars
Galactic OB-star HR-diagram data imply a constant core overshoot α_ov ≈ 0.33 for 12–40 M_sun, yielding larger helium cores than standard prescriptions.