Survival of Terrestrial Planets in the Presence of Giant Planet Migration

The presence of ``Hot Jupiters'', Jovian mass planets with very short orbitalperiods orbiting nearby main sequence stars, has been proposed to be primarilydue to the orbital migration of planets formed in orbits initially much furtherfrom the parent star. The migration of giant planets would have profoundeffects on the evolution of inner terrestrial planets in these systems, andprevious analyses have assumed that no terrestrial planets survive aftermigration has occurred. We present numerical simulations showing that asignificant fraction of terrestrial planets could survive the migrationprocess, eventually returning to circular orbits relatively close to theiroriginal positions. A fraction of the final orbits are in the Habitable Zone,suggesting that planetary systems with close-in giant planets are viabletargets for searches for Earth-like habitable planets around other stars.Comment: 5 pages, 3 figures, emulateapj. ApJL in press, referee comments changes and edited for lengt