Paper:	Effects of Planetesimal Dynamics on the Formation of Terrestrial Planets
Volume:	316, Order and Chaos in Stellar and Planetary Systems
Page:	132
Authors:	Rafikov, R.R.
Abstract:	Formation of terrestrial planets by agglomeration of planetesimals in protoplanetary disks sensitively depends on the velocity evolution of planetesimals. We describe a novel semi-analytical approach to the treatment of planetesimal dynamics incorporating the gravitational scattering by massive protoplanetary bodies. Using this method we confirm that planets grow very slowly in the outer Solar System if gravitational scattering is the only process determining planetesimal velocities, making it hard for giant planets to acquire their massive gaseous envelopes within ≤107 yr. We put forward several possibilities for alleviating this problem.

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