Dynamics of disks with planets

Abstract. We review several theories of origin and evolution of the recently discovered extrasolar planetary systems. The properties of these systems were unexpected. This motivated theorists to extend and revise many preexisting the-ories. Important extensions include migration of bodies and planetary eccentric-ity pumping by planet-planet interaction, and primordial disk-planet interaction. Progress in observational techniques might allow us to nd which of these two types of interaction is mainly responsible for the observed variety of orbits and exoplanet masses. New insights into the formation of our own system can be gained by asking why Jupiter and Saturn are not larger, closer to the sun and/or do not follow noticeably elliptic orbits. Scenarios of planet migration in disks may change markedly on account of a new mode of migration, which does not have a predetermined direction in a given protoplanetary disk, provided it has zones of low and high density. We present the rst simulations of planets undergoing a rapid (runaway) migration. Migration can be inward or outward, depending on the initial disk density dis