Parameters describing the disk surface density profile according to Eq. (38) as a function of time. Fits to the profiles calculated directly from the R2 simulation are shown in dashed black lines, whereas fits to the profiles obtained in our 1D model are depicted with solid blue lines. Left: surface density at reference radial distance r = 12 AU. Middle: disk cutoff radius, describing the radial distance where the surface density starts dropping exponentially. Right: slope of the surface density profile.