SCATTERING OUTCOMES OF CLOSE-IN PLANETS: CONSTRAINTS ON PLANET MIGRATION

SCATTERING OUTCOMES OF CLOSE-IN PLANETS: CONSTRAINTS ON PLANET MIGRATION
复制标题

近地行星的散射结果:对行星迁移的限制

DOI:
10.1088/0004-637x/786/2/101
复制
发表时间:
2014
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
R. Rafikov
R. Rafikov
中科院分区:
--
文献类型:
--
作者:
C. Petrovich;S. Tremaine;R. Rafikov

文献摘要

参考文献

被引文献

相似文献

许多近距离运行的系外行星具有相对较高的偏心率和较大的恒星倾角。我们通过研究具有两颗和三颗气态巨行星的系统(0.05AU<a<0.15 AU)的大量轨道积分的动力学结果,探索了这些现象是行星-行星散射的可能性。我们发现,在这些轨道分离时,低偏心率和相互倾角(e≲0.1,i≲0.1)开始的不稳定系统通常会导致行星-行星碰撞,碰撞产物是一颗处于低偏心率、低倾角轨道上的行星。这一结果与观测结果不一致。我们得出结论,行星-行星散射产生的偏心率和倾角激发必须先于行星向短周期轨道迁移。这一结果限制了行星迁移理论:半长轴必须收缩1-2个数量级,而不会削弱偏心率和倾斜度。
Many exoplanets in close-in orbits are observed to have relatively high eccentricities and large stellar obliquities. We explore the possibility that these result from planet–planet scattering by studying the dynamical outcomes from a large number of orbit integrations in systems with two and three gas-giant planets in close-in orbits (0.05 AU < a < 0.15 AU). We find that at these orbital separations, unstable systems starting with low eccentricities and mutual inclinations (e ≲ 0.1, i ≲ 0.1) generally lead to planet–planet collisions in which the collision product is a planet on a low-eccentricity, low-inclination orbit. This result is inconsistent with the observations. We conclude that eccentricity and inclination excitation from planet–planet scattering must precede migration of planets into short-period orbits. This result constrains theories of planet migration: the semi-major axis must shrink by 1–2 orders of magnitude without damping the eccentricity and inclination.
DOI: 10.1146/annurev-astro-081811-125523
发表时间: 2012-03
影响因子: 33.3
作者:
W. Kley;R. Nelson
通讯作者: W. Kley;R. Nelson
圆盘-行星相互作用的全局 3D 模拟对偏心率增长的限制
DOI: 10.1093/mnras/sts254
发表时间: 2013
影响因子: 4.8
作者:
Dunhill A
通讯作者: Dunhill A