Astrophysics (Index)About

planetary migration

(change in planet's orbit)

Planetary migration is a change in a planet's orbit, either smooth migration from interaction with a protoplanetary disk (planet-disk interaction, gas disk migration or just disk migration) or planetesimals, or violent migration, due to close encounters or collisions of planets (planet-planet scattering). The former is classified by the underlying mechanism as follows:

Planet-planet scattering (gravitational scattering) seems necessary to explain observed orbital inclinations, which include misalignment between planetary orbits and stellar rotation, and even retrograde orbits. Smaller inclinations might be ascribed to a tilt of the star or a tilt of the disk by some unknown means. In simulations, planet scattering has produced larger inclinations, including a coplanar flip.

(planets,planet formation,migration)
Further reading:

Referenced by pages:
corotation torque
dead zone
equilibrium condensation model
late heavy bombardment (LHB)
Lindblad torque
magnetorotational instability (MRI)
Nice model
planetary science
planet formation
radiation pressure
tidal migration