Stellar spin evolution for different stellar spin evolutionary tracks of the layered disk reference model with respect to the simulation time t in years starting from t₀ = 1 Myr. Panel a shows the stellar rotational period P_* for the reference model MrefB with W = 2% (red line) as well as for models with W = 0% (black line) and W = 5% (blue line). Panel b shows the disk accretion rate Ṁ_disk for the respective models.