行星迁移述评

Planetary Migration—A Review

轨道靠近恒星的太阳系外大行星的发现导致对星盘与行星相互作用和行星迁移形式的广泛研究。行星迁移发生在行星与气体或星子的星盘之间进行潮汐相互作用时,这造成行星轨道参数,特别是半主轴的变更。早期研究建立了I型和II型行星迁移方式,分别对应于小质量行星和形成能隙的大质量行星。另外,讨论了新的能够快速迁移的III型迁移方式,它可以使大质量星盘中的行星直接向内或向外迁移。

The discovery of extrasolar giant planets with orbit closing to stars led to extensive studies regarding disk-planet interactions and planetary migration forms.When the planetary migration occurs under the tidally interaction of a planet and a disk of gas or a planetesimal,the orbital parameters,especially,semi-major axis,of this planet will be altered.Previous studies have established type I and type II migration types for low mass planets and high mass gap forming planets,respectively.In addition,a new migration type of fast migrating,type III,was discussed.This migration type is believed to cause planets in a massive disk migrate directly inwards or outwards.