Evolution of stellar radius R_⋆ (R_⊙) (upper panel), magnetic field B_CR + B_mod (G) (middle panel), and effective temperature T_eff (K) (lower panel) as function of time. It is for a 1 M_⊙ star at solar metallicity and for accretion rate at 1 Myr of Ṁ_acc,init = 10⁻⁹ M_⊙ yr⁻¹. The stellar model is from Amard et al. (2019). The dashed line in the upper panel corresponds to R_⋆ = 2.5 R_⊙. In the middle panel, the colours correspond to the three different initial rotation rates: fast (blue), median (green), and slow (red). The solid lines are for Q_acc = 10% and the dotted lines are for Q_acc = 1%.