Stellar models require a convective step-overshoot of 1.2 to match the observed k2 in HD 152248, showing that standard models produce insufficient core-to-envelope density contrast in massive stars.
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The Beauty of k2: Probing Stellar Interiors Using Apsidal Motion. I. The Benchmark Massive Binary HD 152248
Stellar models require a convective step-overshoot of 1.2 to match the observed k2 in HD 152248, showing that standard models produce insufficient core-to-envelope density contrast in massive stars.