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arXiv 1209.1708nlin.CDastro-ph.GA
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银河系哈密顿系统混沌探测的一种新动力学指标

A new dynamical indicator for chaos detection in galactic Hamiltonian systems

Euaggelos E. Zotos

摘要:

一个新的动力学参数,f-指标,介绍和使用,以区分正规和混沌运动的银河哈密顿系统。使用了两种星系势:(i)描述整个星系的全局势和(ii)由受扰谐振子组成的局部势,描述平衡点附近的运动。新的指标基于可分离系统沿x、y和z轴的能量。通过与最大李雅普诺夫特征指数(L.C.E)、S(c)动力学谱等方法的比较,表明新的动力学指标能快速、可靠地给出轨道的规则性和混沌性。新指标在两个(2D)度和三个(3D)自由度的几个哈密顿系统中进行了测试。

英文摘要:

A new dynamical parameter, the f-indicator, is introduced and used in order to distinguish between regular and chaotic motion in galactic Hamiltonian systems. Two kinds of galactic potentials are used: (i) a global potential, which describes the whole galaxy and (ii) a local potential, which is made up of perturbed harmonic oscillators and describes motion near an equilibrium point. The new indicator is based on the energies of the separable system along the x, y and z axis. Comparison between the outcomes obtained using the new dynamical parameter and other methods, such as the maximum Lyapunov Characteristic Exponent (L.C.E), or the S(c) dynamical spectrum, shows that the new dynamical indicator gives fast and reliable results concerning the regular or chaotic character of the orbits. The new indicator was tested in several Hamiltonian systems of two (2D) degrees and three (3D) degrees of freedom.

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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