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arXiv 1205.0950astro-ph.EP
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限制性三体问题的共振研究

Study of Resonances for the Restricted 3-Body Problem

Billy Quarles, Zdzislaw Musielak, Manfred Cuntz

摘要:

我们的目的是识别和分类平均运动共振(MMR)的共面圆形限制性三体问题(CR3BP)的质量比在0.10和0.50之间。我们的方法包括最大的李雅普诺夫指数,这是用来作为一个指标的共振的位置,快速傅立叶变换(FFT)用于确定什么样的共振存在,和检查的轨道要素分类的周期性。我们发现,2:1共振发生的最频繁。在其他共振中,3:1共振是第二常见的,此外3:2和5:3共振都比4:1共振更经常发生。此外,共面CR3BP中的共振被分类的基础上的行为的轨道。我们表明,轨道稳定性是确保高值的共振(即,更高比率),其中仅存在单个谐振。获得的共振与先前建立的太阳系共振一致,即,特别是关于小行星带的。以前的工作采用数字滤波和李雅普诺夫特征指数,以确定随机性的偏心率,这是一致的,我们使用的李雅普诺夫指数作为一种替代方法的基础上改变的质量比,而不是偏心。我们的研究结果预计将是主要的兴趣,未来的研究,包括增强观测或建议的共振,太阳系外行星的双星系统。

英文摘要:

Our aim is to identify and classify mean-motion resonances (MMRs) for the coplanar circular restricted three-body problem (CR3BP) for mass ratios between 0.10 and 0.50. Our methods include the maximum Lyapunov exponent, which is used as an indicator for the location of the resonances, the Fast Fourier Transform (FFT) used for determining what kind of resonances are present, and the inspection of the orbital elements to classify the periodicity. We show that the 2:1 resonance occurs the most frequently. Among other resonances, the 3:1 resonance is the second most common, and furthermore both 3:2 and 5:3 resonances occur more often than the 4:1 resonance. Moreover, the resonances in the coplanar CR3BP are classified based on the behaviour of the orbits. We show that orbital stability is ensured for high values of resonance (i.e., high ratios) where only a single resonance is present. The resonances attained are consistent with the previously established resonances for the Solar System, i.e., specifically, in regards to the asteroid belt. Previous work employed digital filtering and Lyapunov characteristic exponents to determine stochasticity of the eccentricity, which is found to be consistent with our usage of Lyapunov exponents as an alternate approach based on varying the mass ratio instead of the eccentricity. Our results are expected to be of principal interest to future studies, including augmentations to observed or proposed resonances, of extra-solar planets in binary stellar systems.

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