论文标题
Yarkovsky效应下的7/3 Kirkwood差距的小行星过境
Transit of asteroids across the 7/3 Kirkwood gap under the Yarkovsky effect
论文作者
论文摘要
主皮带中的许多小行星都被Yarkovsky效应不断推向不同的平均运动共振区域（MMR），然后弹出。它们被认为是近地物体的主要来源。我们在本文中研究了7/3 mMR与木星（J7/3 mmr）对分别位于共振内部和外侧的科罗尼斯和EOS家族的小行星运输的影响。发现成功穿越共振的小行星的比例和来自共振的逃逸率取决于Yarkovsky漂移率，初始倾斜度和迁移方向。讨论了由于共振和Yarkovsky效应的综合影响而引起的偏心率和倾向的激发。只有偏心率才能大量泵送，这主要归因于共鸣。在观察数据中，在共振和共鸣的另一侧也发现了家庭成员相对于相应的家庭中心。使用我们的数值模拟结果来解释这些家庭成员的存在。最后，讨论了J7/3 MMR中小行星的补充以及小行星的运输。
Many asteroids in the main belt are continuously pushed by Yarkovsky effect into regions of different mean motion resonances (MMRs) and then ejected out. They are considered as the principal source of near-Earth objects. We investigate in this paper the effects of the 7/3 MMR with Jupiter (J7/3 MMR) on the transportation of asteroids from Koronis and Eos families that reside respectively on the inner and outer side of the resonance. The fraction of asteroids that make successful crossing through the resonance and the escaping rate from the resonance are found to depend on the Yarkovsky drifting rate, the initial inclination and the migrating direction. The excitation of eccentricity and inclination due to the combined influence from both the resonance and Yarkovsky effect is discussed. Only the eccentricity can be pumped up considerably, and it is attributed mainly to the resonance. In the observational data, family members are also found in the resonance and on the opposite side of the resonance with respect to the corresponding family centre. The existence of these family members is explained using our results of numerical simulations. Finally, the replenishment of asteroids in the J7/3 MMR and the transportation of asteroids by it are discussed.
