论文标题
由于卫星与巨大的土星环之间的相互作用，土星卫星的轨道演变
Orbital evolution of Saturn's satellites due to the interaction between the moons and massive Saturn's rings
论文作者
论文摘要
土星的中型卫星（卫星）具有令人困惑的轨道构型，并与其他每对捕获平均动作共振（Mimas-Tethys 4：2和Ecceladus-Dione 2：1）。为了基于Crida＆Charnoz的卫星形成模型从假设的古代巨大环中重现其当前的轨道构型，相邻对必须通过一阶平均均匀共振而不会被捕获。可以通过快速轨道迁移和/或激发卫星的偏心率，这是由于卫星与环之间的重力相互作用（磁盘）（磁盘）引起的，这可以避免陷阱。在我们的研究中，由于通过完整的N体模拟与磁盘相互作用，我们研究了卫星轨道的演化。我们进行了与单个卫星相互作用的自我散热粒子磁盘的全局高分辨率N体模拟。我们将$ n \ sim 10^5 $粒子用于磁盘。考虑所有颗粒的重力及其非弹性碰撞。结果，密集的短波长唤醒结构是由磁盘的自我强度和$ m \ sim $的全球螺旋臂创建的，卫星诱发了一些。自我重力唤醒调节卫星的轨道演化，该卫星被认为是磁盘扩展机制，但不是作为轨道进化的驱动器。卫星的自我重力唤醒扭矩是如此有效，以至于卫星迁移速度要比螺旋臂扭矩所预测的要快得多。它提供了一个可能的模型，以避免相邻卫星对的共振捕获并建立土星中型卫星的当前轨道构型。
Saturn's mid-sized moons (satellites) have a puzzling orbital configuration with trapping in mean-motion resonances with every other pairs (Mimas-Tethys 4:2 and Enceladus-Dione 2:1). To reproduce their current orbital configuration on the basis of Crida & Charnoz's model of satellite formation from a hypothetical ancient massive rings, adjacent pairs must pass 1st-order mean-motion resonances without being trapped. The trapping could be avoided by fast orbital migration and/or excitation of the satellite's eccentricity caused by gravitational interactions between the satellites and the rings (the disk), which are still unknown. In our research, we investigate the satellite orbital evolution due to interactions with the disk through full N-body simulations. We performed global high-resolution N-body simulations of a self-gravitating particle disk interacting with a single satellite. We used $N \sim 10^5$ particles for the disk. Gravitational forces of all the particles and their inelastic collisions are taken into account. As a result, dense short-wavelength wake structure is created by the disk self-gravity and global spiral arms with $m \sim$ a few is induced by the satellite. The self-gravity wakes regulate the orbital evolution of the satellite, which has been considered as a disk spreading mechanism but not as a driver for the orbital evolution. The self-gravity wake torque to the satellite is so effective that the satellite migration is much faster than that was predicted with the spiral arms torque. It provides a possible model to avoid the resonance capture of adjacent satellite pairs and establish the current orbital configuration of Saturn's mid-sized satellites.
