Embryo mass, surface densities, and planetesimal eccentricity as function of time at different distances. The different panels are (top) embryo mass, (middle) surface densities of planetesimals (solid) and fragments (dashed), and (bottom) planetesimal eccentricity and threshold eccentricity for fragmentation (dashed). Time is expressed relative to the planetesimal formation time t₀ for better comparison. The colours correspond to the different distances.