Theoretical study on the origin and evolution of small icy bodies in the solar system

首先，我们研究了巨行星对星子的临时捕获，这可能在巨行星不规则卫星的捕获中发挥了重要作用。通过数值模拟，我们研究了捕获率以及它们对不同轨道参数的依赖。我们的结果表明，木星的一些顺行不规则卫星的源区对应于希尔达区。接下来，我们研究了潮汐环境中粒子吸积和聚集体碰撞破坏的过程。我们得到了粒子吸积的临界径向距离，并澄清了破坏的条件。最后，我们研究了一颗生长中的巨行星的环绕行星的气体盘对星子的捕获，这对于巨行星的规则卫星的起源是重要的。我们得到了捕获率，并研究了它们与各种参数的依赖关系。

First, we examined temporary capture of planetesimals by a giant planet, which likely played an important role in capture of irregular satellites of giant planets. Using numerical simulations, we investigated capture rates as well as their dependence on various orbital parameters. Our results suggest that the source region of some of the prograge irregular satellites of Jupiter corresponds to the Hilda region. Next, we examined the process of particle accretion and collisional disruption of aggregates in the tidal environment. We obtained the critical radial distance for particle accretion, and clarified the condition for disruption. Finally, we examined capture of planetesimals by the circumplanetary gas disk of a growing giant planet, which is important in relation to the origin of regular satellites of giant planets. We obtained capture rates and also investigated their dependence on various parameters.