The effect of orbita damping during planet migration on the inclination and eccentricity distributions of Neptunian Trojans
The effect of orbita damping during planet migration on the inclination and eccentricity distributions of Neptunian Trojans
复制标题
行星迁移过程中轨道阻尼对海王星特洛伊木马倾角和偏心率分布的影响
DOI：
10.1093/mnras/stw361
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发表时间：
--
影响因子：
4.8
通讯作者：
Zheng Jiaqing
中科院分区：
文献类型：
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作者：
Chen Yuanyuan;Ma Yuehua;Zheng Jiaqing
我们探索了高倾角海王星特洛伊（nt）形成的行星迁移场景，以及它们如何受到海王星和天王星行星迁移的影响。如果海王星和天王星的离心率和倾斜度在行星迁移过程中受到了抑制，那么它们的离心率和倾斜度在迁移之前和迁移过程中比现在的值更高。使用测试粒子积分，我们研究了原始NTs的稳定性，这些物体在迁移之前最初是海王星的特洛伊。我们还研究了在行星迁移过程中捕获到与海王星共振并成为nt的海王星外天体。我们发现，如果在行星迁移过程中发生偏心和倾斜阻尼，那么大多数原始nt都是不稳定和丢失的。通过阻尼，与海王星的长期共振可以增加海王星外天体的低偏心率和倾角，增加它们被捕获到与海王星1:1共振的概率，成为高倾角的nt。我们认为共振俘获是解释NTs起源的一个有希望和更有效的机制，特别是如果天王星和海王星在行星迁移过程中经历了偏心和倾斜阻尼。
We explore planetary migration scenarios for the formation of high-inclination Neptunian Trojans (NTs) and how they are affected by the planetary migration of Neptune and Uranus. If Neptune's and Uranus's eccentricity and inclination were damped during planetary migration, then their eccentricities and inclinations were higher prior and during the migration than their current values. Using test particle integrations, we study the stability of primordial NTs, objects that were initially Trojans with Neptune prior to migration. We also study trans-Neptunian objects captured into resonance with Neptune and becoming NTs during planet migration. We find that most primordial NTs were unstable and lost if eccentricity and inclination damping took place during planetary migration. With damping, secular resonances with Neptune can increase a low eccentricity and inclination population of trans-Neptunian objects increasing the probability that they are captured into 1: 1 resonance with Neptune, becoming high-inclination NTs. We suggest that the resonant trapping scenario is a promising and more effective mechanism to explain the origin of NTs, which is particularly effective if Uranus and Neptune experienced eccentricity and inclination damping during planetary migration.