Γ₁(t) (both panels a & b for clarity) and ψ(t) (panel c) profiles extracted from CESTAM early main sequence models with masses ranging from 0.7 M_⊙ to 1.35 M_⊙ (and from 0.45 M_⊙ to 1.5 M_⊙ as an indication in dashes). All models share the same composition which is the solar one as well as the same evolutionary state: X_c = 0.6. The qualitative variations of ε with mass are represented as well as the ψ span corresponding to the mass uncertainty of HD 52265 taken from Lebreton & Goupil (2014).