Fig. 1

HR diagram for the reference primary M1 = 2.50 M⊙ (blue solid line) and secondary M2 = 2.38 M⊙ (green dashed line) stars. The three studied scenarios are identified by circles (A), squares (B), and diamonds (C). The parameters adopted for the stellar evolution are: M1 = 2.50 M⊙, M2 = 2.38 M⊙, Z = 0.0134, Y = 0.275, β = 0.16.
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