Fig. 4
Central hydrogen content of the selected models during their main sequence evolution: 1.2 M⊙ (blue) and 1.5 M⊙ (red). Solid lines: Schwarzschild criterion without overshooting. Dashed lines: Ledoux criterion with no semiconvective mixing (αsc = 0). Dash-dotted lines: Ledoux criterion and a semiconvective efficiency of αsc = 0.01. Dotted lines: models with convective overshooting.
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