论文标题
多层状外系统中的混乱
Chaos in multiplanetary extrasolar systems
论文作者
论文摘要
在这里，我们最初介绍了178个多层次系统的动态和稳定性，这些系统已在NASA系外行星档案中已确认和列出。为了区分系统的混乱和规则性质，确定了每个系统的MEGNO指标的值。它们中几乎四分之三可以被标记为长期稳定。只有45个研究系统显示混乱的行为。因此，我们研究了行星数量及其参数对系统稳定性的影响。使用MEGNO指标和机器学习算法SPOCK获得的结果的比较表明，SPOCK可以用作审查多层次系统稳定性的有效工具。 Laskar and Petit在2017年已经发表了类似的研究。我们根据AMD标准与结果进行了比较。讨论了可能的差异。
Here we present an initial look at the dynamics and stability of 178 multiplanetary systems which are already confirmed and listed in the NASA Exoplanet Archive. To distinguish between the chaotic and regular nature of a system, the value of the MEGNO indicator for each system was determined. Almost three-quarters of them could be labelled as long-term stable. Only 45 studied systems show chaotic behaviour. We consequently investigated the effects of the number of planets and their parameters on the system stability. A comparison of results obtained using the MEGNO indicator and machine-learning algorithm SPOCK suggests that the SPOCK could be used as an effective tool for reviewing the stability of multiplanetary systems. A similar study was already published by Laskar and Petit in 2017. We compared their analysis based on the AMD criterion with our results. The possible discrepancies are discussed.
