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arXiv 1303.0475nlin.CDastro-ph.GA
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利用新的动力学指标区分产生精确周期轨道和混沌分量的星系势中的有序和混沌

Using new dynamical indicators to distinguish between order and chaos in a galactic potential producing exact periodic orbits and chaotic components

Euaggelos E. Zotos

摘要:

反问题的理论是用来找到一个二维银河势产生一个单参数家庭的椭圆周期轨道。势是由一个二维谐振子与扰动项的第三和第四度,可以被认为是描述本地运动的中心部分的一个棒星系。我们的数值计算表明,潜在的产生也有其他家庭的轨道,并有情况下,也观察到不同的混沌成分。数值实验表明,有规则以及混沌轨道支持的酒吧结构。我们使用各种动力学指标,以确定运动的特征。值得注意的是S(g)动力学谱,它被用来识别共振轨道的岛屿运动,也被证明是一个非常有用和快速的指标,以区分规则和混沌运动。并与其它混沌检测方法进行了比较。目前的结果进行了比较,从早期的工作成果。

英文摘要:

The theory of the inverse problem is used in order to find a two dimensional galactic potential generating a mono-parametric family of elliptic periodic orbits. The potential is made up of a two-dimensional harmonic oscillator with perturbing terms of third and fourth degree and can be considered to describe local motion in the central parts of a barred galaxy. Our numerical calculations indicate that the potential produces also other families of orbits and there are cases, where distinct chaotic components are also observed. The numerical experiments suggest that there are regular as well as chaotic orbits supporting the barred structure. We use a variety of dynamical indicators, in order to determine the character of motion. Of significant interest, is the S(g) dynamical spectrum, which is used in order to identify the islandic motion of resonant orbits and also proves to be a very useful and fast indicator, in order to distinguish between regular and chaotic motion. Comparison with other methods for detecting chaos is also discussed. The present results are compared with outcomes from earlier work.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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