Disk Dispersal and the Stability of Planetary Systems

这个计划将针对太阳系历史上的一个重要阶段，即形成行星的太阳星云盘的扩散，以及这对残存行星系统动力学状态的影响。取决于这种圆盘物质消散的速度和移除它的方法，行星的轨道性质可能会因为它们的引力相互作用而发生严重的扰动。轨道可能会在大小和形状上演变，以扫过圆盘的大片区域，特别是对类地行星、小行星和彗星对象产生影响。可能会发现新的动力学相互作用，这项工作可能会为行星形成的后期阶段提供新的约束。该项目将采用分析和数值两种方法，同时考虑到过去二十年在我们对行星-圆盘相互作用的理解方面取得的广泛进展。

AST-0206366PI WardThis program will target an important stage in solar system history, namely, the dispersal of the solar nebular disk out of which the planets formed, and the effects of this on the dynamical state of the remnant planetary system. Depending on how fast this disk material dissipates and the method by which it is removed, serious disturbances to the orbital properties of the planets may occur owing to their gravitational interactions. Orbits may evolve in size and shape to sweep throughout large regions of the disk especially effecting the terrestrial planets, asteroids, and cometary objects. New dynamical interactions may be found, and this work will likely provide new constraints on later stages of planet formation. The project will employ both analytical and numerical approaches taking into account extensive advances made over the last two decades in our understanding of planet-disk interactions.***