Dependence of extrasolar planetary systems on host stars' metallicity

开普勒太空望远镜已经发现了750多颗太阳系外行星，以及2300多颗候选行星，这激发了行星和行星系统的统计讨论。在这里，我们研究了行星系统对宿主恒星金属丰度的依赖性。已经进行了行星-行星散射和碰撞的N体和流体动力学模拟。结合这些结果，我们还进行了蒙特卡罗模拟，发现在富含金属的星星周围的富含金属的盘中，形成了多个气体巨星，它们经历了轨道稳定性，从而提高了轨道偏心率。我们还推动了径向速度测量，并建立了一个由业余爱好者和学生组成的过境跟踪网络，从理论和观测两方面研究这个问题。

More than 750 extrasolar planets have been discovered, as well as more than 2300 candidates by Kepler space telescope, which motivates statistical discussions of planets and planetary systems. Here we investigated dependence of planetary systems on metallicity of the host stars. N-body and fluid dynamical simulations for planet-planet scattering and collisions have been carried out. Combining these results, we also performed Monte Carlo simulations to find that in a metal-rich disk around a metal-rich star, multiple gas giants are formed and they undergo orbital stability to pump up orbital eccentricities. We also promoted radial velocity surveys and construct a transit follow-up network involving amateurs and students to study the problem both from theory and observation.