Long-Term Dynamics and the Orbital Inclinations of the Classical Kuiper Belt Objects
Long-Term Dynamics and the Orbital Inclinations of the Classical Kuiper Belt Objects
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经典柯伊伯带天体的长期动力学和轨道倾角
DOI：
10.1086/341643
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
M. Holman
中科院分区：
文献类型：
--
作者：
M. Kuchner;M. Brown;M. Holman
对经典柯伊伯带（41 Au ≤ a ≤ 47 Au）内1458个粒子的轨道进行了数值积分，探讨了动力学不稳定性对经典柯伊伯带天体（KBO）倾角分布的影响.我们发现，通过重叠的长期共振（ν17和ν18）选择性地去除低倾角物体，提高了与木星、土星、天王星和海王星相互作用超过40亿年的幸存粒子群的平均倾角，尽管这些长期动力学效应本身似乎并不能解释倾角接近30°的KBO的发现。我们的积分还意味着，经过30亿年的大质量行星的相互作用，高倾角KBO更有效地供应海王星遇到的对象，可能的祖先短周期彗星，半人马座和分散的KBO。在低倾角的长期共振可能会间接导致这种影响，淘汰对象不受平均运动共振在第一个30亿年。
We numerically integrated the orbits of 1458 particles in the region of the classical Kuiper belt (41 AU ≤ a ≤ 47 AU) to explore the role of dynamical instabilities in sculpting the inclination distribution of the classical Kuiper belt objects (KBOs). We find that the selective removal of low-inclination objects by overlapping secular resonances (ν17 and ν18) acts to raise the mean inclination of the surviving population of particles over 4 billion yr of interactions with Jupiter, Saturn, Uranus, and Neptune, though these long-term dynamical effects do not themselves appear to explain the discovery of KBOs with inclinations near 30°. Our integrations also imply that after 3 billion yr of interaction with the massive planets, high-inclination KBOs more efficiently supply Neptune-encountering objects, the likely progenitors of short-period comets, Centaurs, and scattered KBOs. The secular resonances at low inclinations may indirectly cause this effect by weeding out objects unprotected by mean motion resonances during the first 3 billion yr.