论文标题
跳跃木星驱动的L4和L5木星特洛伊木马的不对称性
Asymmetry in the number of L4 and L5 Jupiter Trojans driven by jumping Jupiter
论文作者
论文摘要
语境。到目前为止，已经发现了10000多个木星特洛伊木马。他们围绕太阳jupiter系统的L4和L5三角拉格朗加亚点移动，它们的分布可以为太阳系的早期演变提供重要的线索。 目标。 L4和L5木星特洛伊木马的不对称数量是一个长期存在的问题。我们旨在测试一种新的机制，以通过调用跳跃 - jupiter方案来解释这种异常功能。 方法。首先，我们引入了由早期太阳系中巨大行星不稳定引起的木星的轨道演变。在这种情况下，木星可以以很高的速度进行外向迁移。然后，我们研究了这种跳跃如何改变L4（N4）和L5（N5）木马的数量。 结果。木星的向外迁移会扭曲拉格朗日点附近的共晶轨道，从而导致L4木马比L5更稳定。我们发现，这种机制可能可以解释已知的木星木马的N4/N5〜1.6的无偏数不对称数。系统参数的不确定性，例如还考虑了木星的怪异和倾向，即木星特洛伊木马的倾斜度分布，我们对L4/L5不对称的结果得到了进一步验证。但是，与当前人群相比，模拟木马的谐振幅度对更高的值感到兴奋。一个可能的解决方案是，木马之间的碰撞可能会减少其谐振振幅。
Context. More than 10000 Jupiter Trojans have been detected so far. They are moving around the L4 and L5 triangular Lagrangian points of the Sun-Jupiter system and their distributions can provide important clues to the early evolution of the Solar System. Aims. The number asymmetry of the L4 and L5 Jupiter Trojans is a longstanding problem. We aim to test a new mechanism in order to explain this anomalous feature by invoking the jumping-Jupiter scenario. Methods. First, we introduce the orbital evolution of Jupiter caused by the giant planet instability in the early Solar System. In this scenario, Jupiter could undergo an outward migration at a very high speed. We then investigate how such a jump changes the numbers of the L4 (N4) and L5 (N5) Trojans. Results. The outward migration of Jupiter can distort the co-orbital orbits near the Lagrangian points, resulting in L4 Trojans being more stable than the L5 ones. We find that, this mechanism could potentially explain the unbiased number asymmetry of N4/N5~1.6 for the known Jupiter Trojans. The uncertainties of the system parameters, e.g. Jupiter's eccentricity and inclination, the inclination distribution of Jupiter Trojans, are also taken into account and our results about the L4/L5 asymmetry have been further validated. However, the resonant amplitudes of the simulated Trojans are excited to higher values compared to the current population. A possible solution is that collisions among the Trojans may reduce their resonant amplitudes.
