Disk Dispersal and the Stability of Planetary Systems

这个项目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消散，以及这一阶段对残余行星系统动力学状态的影响。根据这些圆盘物质消散的速度和清除方法的不同，由于它们的引力相互作用，可能会对行星的轨道特性产生严重的干扰。轨道可能在大小和形状上进化，以横扫圆盘的大片区域，特别是对类地行星、小行星和彗星物体产生影响。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限制。该项目将采用分析和数值方法，同时考虑到过去二十年来我们对行星-磁盘相互作用的理解取得的广泛进展

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.***