Planet–planet scattering in circumstellar gas disks
Planet–planet scattering in circumstellar gas disks
复制标题
星周气盘中的行星-行星散射
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
H. Scholl
中科院分区：
文献类型：
--
作者：
F. Marzari;C. Baruteau;H. Scholl
上下文。对嵌入气盘的两颗巨行星的流体动力学模拟表明，在平稳收敛迁移的情况下，它们最终被困在平均运动共振中。这些发现使人们确信，只有在气体消散后，当偏心阻尼结束时，才会发生导致行星之间近距离相遇的动力不稳定的开始。目标。我们发现，当密度值与最小质量太阳星云相当的气态盘仍在与行星相互作用时，由三颗巨行星组成的系统可能会发生行星-行星散射。方法：研究方法。流体动力学程序Fargo-2D-1D被用来模拟圆盘和行星的演化，对其进行了修改，以适当地处理大质量天体之间的近距离碰撞。结果。我们的模拟预测了散射阶段的各种不同结果，包括轨道交换、行星合并和双曲轨道上行星的散射。结论。这意味着，多行星系统在盘力矩作用下的最终命运不一定是压缩的共振构型。
Context. Hydrodynamical simulations of two giant planets embedded in a gaseous disk have shown that in case of a smooth convergent migration they end up trapped into a mean motion resonance. These findings have led to the conviction that the onset of dyna mical instability causing close encounters between the planets can occur only after the dissipation of the gas when the eccentricity damping is over. Aims. We show that a system of three giant planets may undergo planet-planet scattering when the gaseous disk, with density val ues comparable to that of the Minimum Mass Solar Nebula, is still interacting with the planets. Methods. The hydrodynamical code FARGO‐2D‐1D is used to model the evolution of the disk and planets, modified to properly handle close encounters between the massive bodies. Results. Our simulations predict a variety of different outcomes of the scattering phase which includes orbital exchange, planet merging and scattering of a planet in a hyperbolic orbit. Conclusions. This implies that the final fate of a multiplanet system under the action of the disk torques is not necessarily a packed resonant configuration.