The fate of moons of close-in giant exoplanets
Abstract wrote:We show that the fate of moons of a close-in giant planet is mainly determined by the migration history of the planet in the protoplanetary disk. As the planet migrates in the disk from beyond the snow line towards a multi-day period orbit, the formed and forming moons become unstable as the planet's sphere of influence shrinks. Disk-driven migration is faster than the moons' tidal orbital evolution. Moons are eventually ejected from around close-in exoplanets or forced into collision with them before tides from the star affect their orbits. If moons are detected around close-in exoplanets, they are unlikely to have been formed in situ, instead they were captured from the protoplanetary disk on retrograde orbits around the planets.
Caps Lock: Cruise control for 'Cool'!
- Number of posts : 3414
Location : Earth
Registration date : 2008-04-06
Permissions in this forum:You cannot reply to topics in this forum