Left: planetary embryo growth via pebble accretion in the compact protoplanetary disk in models with α = 10⁻⁴ and different fragmentation threshold speeds and one not including dust fragmentation at all. In all cases where the line representing the v_f = 10 m s⁻¹ run is not visible, it is identical to the “no fragmentation” run. Lines ending with a circle represent growth tracks that reached the pebble isolation mass. Right: inward flux of solids (all dust sizes integrated) at different locations in the same models.