Effects of pebble accretion on the growth and composition of planetesimals in the inner Solar system

Recent work has shown that aside from the classical view of collisions by increasingly massive planetesimals, accretion mm- to m-sized 'pebbles' can also reproduce mass-orbit distribution terrestrial planets. Here, we perform N-body simulations study effects pebble onto growing planetesimals different diameters located in inner Solar System. The are run occur during lifetime gas disc while simultaneously taking Jupiter's growth into account. We find increase mass solid at least a few times its initial with reasonable assumptions pebbles fragment smaller-sized grains snow line and gas-disc-induced orbital migration force. Such large contribution would seem imply isotopic composition System should be similar source (i.e. outer System). This implication appears violate observed nucleosynthetic dichotomy sampled Thus, played little or no role planet formation.