Variations in Δν as a function of stellar mass at fixed value of ΔΠ₁ (71 ± 0.5 s). Blue filled circles represent models from our grid, with α_ov = 0, 0.1, and 0.2 from light blue to dark blue. For clarity, a small artificial shift in mass was applied to clearly separate models with different α_ov. The black dashed line corresponds to the fit of a power law to the Δν − M relation using the models of the grid. Red circles connected by a thick red line correspond to a 1.6 M_⊙ stellar model to which various amounts of mass loss have been applied (see Sect. 4.3).