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arXiv 1707.03026astro-ph.EP
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半人马座α星系的Lidov-Kozai稳定区

Lidov-Kozai stability regions in the alpha Centauri system

C. A. Giuppone, A. C. M. Correia

摘要:

半人马座α AB恒星系统中行星的稳定性已被广泛研究。然而,大多数研究要么集中在双星的轨道平面上,要么考虑倾斜的圆形轨道。在这里,我们数值研究了一个可能的行星在阿尔法-半人马座AB二元系统的S-型轨道在任意空间配置的稳定性。特别是,我们专注于倾斜轨道,并探讨不同的偏心率和取向角的稳定性。我们发现,大的稳定和定期区域存在非常偏心和倾斜的轨道,对应于天平动的Lidov-Kozai共振。我们还表明,这些极端的轨道可以生存在系统的年龄,尽管潮汐的影响。我们的结果仍然定性相同的任何紧凑的二元系统。

英文摘要:

The stability of planets in the alpha-Centauri AB stellar system has been studied extensively. However, most studies either focus on the orbital plane of the binary or consider inclined circular orbits. Here, we numerically investigate the stability of a possible planet in the alpha-Centauri AB binary system for S-type orbits in an arbitrary spatial configuration. In particular, we focus on inclined orbits and explore the stability for different eccentricities and orientation angles. We show that large stable and regular regions are present for very eccentric and inclined orbits, corresponding to libration in the Lidov-Kozai resonance. We additionally show that these extreme orbits can survive over the age of the system, despite the effect of tides. Our results remain qualitatively the same for any compact binary system.

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