...
首页> 外文期刊>Chinese Journal of Astronomy and Astrophysics >Formation of the Kuiper Belt by Long Time-Scale Migration of Jovian Planets
【24h】

Formation of the Kuiper Belt by Long Time-Scale Migration of Jovian Planets

机译:木星行星的长时间尺度迁移形成了柯伊伯带

获取原文
获取原文并翻译 | 示例
           

摘要

The orbital migration of Jovian planets is believed to have played an important role in shaping the Kuiper Belt. We investigate the effects of the long time-scale (2 x 10~7 yr) migration of Jovian planets on the orbital evolution of massless test particles that are initially located beyond 28 AU. Because of the slowness of the migration, Neptune's mean motion resonances capture test particles very efficiently. Taking into account the stochastic behavior during the planetary migration and for proper parameter values, the resulting concentration of objects in the 3:2 resonance is prominent, while very few objects enter the 2:1 resonance, thus matching the observed Kuiper Belt objects very well. We also find that such a long time-scale migration is favorable for exciting the inclinations of the test particles, because it makes the secular resonance possible to operate during the migration. Our analyses show that the ν_8 secular resonance excites the eccentricities of some test particles, so decreasing their perihelion distances, leading to close encounters with Neptune, which can then pump the inclinations up to 20°.
机译:据信,木星的轨道迁移对塑造柯伊伯带起了重要作用。我们研究了木星行星的长时间尺度(2 x 10〜7年)迁移对最初位于28 AU以上的无质量测试粒子的轨道演变的影响。由于迁移的缓慢性,海王星的平均运动共振非常有效地捕获了测试粒子。考虑到行星迁移过程中的随机行为以及适当的参数值,最终产生的物体在3:2共振中的集中度很明显,而很少有物体进入2:1共振,因此与观察到的柯伊伯带物体非常匹配。我们还发现,如此长的时间尺度的迁移有利于激发测试粒子的倾斜,因为它使迁移过程中的长期共振成为可能。我们的分析表明,ν_8长期共振激发了一些测试粒子的偏心率,因此减小了它们的近日点距离,导致与海王星的近距离相遇,然后可以将倾斜度提升至20°。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号