论文标题
关于逆行木星特洛伊木马的动态起源及其与高分子TNOS的联系
On the Dynamical Origins of Retrograde Jupiter Trojans and their Connection to High-Inclination TNOs
论文作者
论文摘要
在过去的十年中，观察到高度分类（轨道倾斜度I> 60°）的跨核对象（TNOS）对当前太阳系形成模型构成了重要挑战（Levison等人2008；Nesvorný2015）。这些显着的次要行星需要存在遥远的平面TNO的遥远储层，这本身需要一些动态的生产机制（Gladman等，2009; Gomes等人，2015; Batygin and Brown and Brown 2016）。逆行小行星514107 ka'epaoka'awela最近在太阳系中的高级次要物体的普查是一个值得注意的增加，目前与木星在i = 163°处占据1：-1平均运动共鸣（Wiegert等人，2017年）。在这项工作中，我们描述了逆行木星特洛伊木马和高级I Centaurs之间的直接联系。首先，我们将大量的Ka'epaoka'awela克隆以数值为单位上，并证明长期稳定的克隆倾向于稳步降低其倾向，直到它集中在90°和135°之间，而它们的偏心率和半马约尔轴则增加了许多人，将许多人牢固地置于Transepneptneptunian domain中。重要的是，这些克隆表现出与第9行星研究中产生的合成高I也有显着的重叠（Batygin等人，2019年），并暗示存在占据极性反式 - 旧约轨道的相对突出，稳态的次要次要人群。其次，通过直接的数值向前模型，我们描绘了动态途径，库珀带散射磁盘种群的传统成员可以在Planet 9存在的情况下变成逆行Jovian Trojan共振器。
Over the course of the last decade, observations of highly-inclined (orbital inclination i > 60°) Trans-Neptunian Objects (TNOs) have posed an important challenge to current models of solar system formation (Levison et al. 2008; Nesvorný 2015). These remarkable minor planets necessitate the presence of a distant reservoir of strongly-out-of-plane TNOs, which itself requires some dynamical production mechanism (Gladman et al. 2009; Gomes et al. 2015; Batygin and Brown 2016). A notable recent addition to the census of high-i minor bodies in the solar system is the retrograde asteroid 514107 Ka'epaoka'awela, which currently occupies a 1:-1 mean motion resonance with Jupiter at i = 163° (Wiegert et al. 2017). In this work, we delineate a direct connection between retrograde Jupiter Trojans and high-i Centaurs. First, we back-propagate a large sample of clones of Ka'epaoka'awela for 100 Ma numerically, and demonstrate that long-term stable clones tend to decrease their inclination steadily until it concentrates between 90° and 135°, while their eccentricity and semi-major axis increase, placing many of them firmly into the trans-Neptunian domain. Importantly, the clones show significant overlap with the synthetic high-i Centaurs generated in Planet 9 studies (Batygin et al. 2019), and hint at the existence of a relatively prominent, steady-state population of minor bodies occupying polar trans-Saturnian orbits. Second, through direct numerical forward-modeling, we delineate the dynamical pathway through which conventional members of the Kuiper Belt's scattered disk population can become retrograde Jovian Trojan resonators in presence of Planet 9.
