标题： 近距巨大系外行星的卫星命运 显示英文标题

标题： The fate of moons of close-in giant exoplanets

摘要： 我们证明，近距离巨型行星的卫星命运主要由该行星在原行星盘中的迁移历史决定。 当行星从雪线以外向周期多天的轨道迁移时，形成的和正在形成的卫星变得不稳定，因为行星的引力影响范围缩小了。 盘驱动的迁移速度比卫星的潮汐轨道演化更快。 卫星最终会被从近距离系外行星周围弹出，或在恒星潮汐影响其轨道之前被推入与行星相撞。 如果在近距离系外行星周围探测到卫星，它们不太可能是在原地形成的，而是可能从原行星盘中被捕获，并以逆行轨道围绕行星运行。 显示英文摘要

摘要： 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.