电离层多离子等离子体中超越磁声波孤波的碰撞特性

IF 1.8 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS
Dong-Ning Gao, Heng Zhang, Zhong-Zheng Li
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引用次数: 0

摘要

我们研究了在地球电离层由轻暖离子、冷重离子和热电子组成的磁化等离子体中传播的磁声波(MWs)。给出了弥散关系,并显示了不同物理参数对快速和慢速 MSW 频率的影响。我们推导了多离子等离子体中 MSW 的 KdV 方程,并通过 Hirota 双线性方法研究了 KdV MSW 的双oliton 和三oliton 超越碰撞。我们展示了这一过程中孤子的轨迹和振幅,以及碰撞后的相移。研究发现,当孤子合并时,会形成新的孤子,其振幅先减小后增大。研究还给出了物理参数对多孤子碰撞相移的影响。值得注意的是,孤子的相互作用会导致等离子体中动量和能量的重新分配。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Collision properties of overtaking magnetosonic solitary waves in the ionospheric multi-ion plasmas

Collision properties of overtaking magnetosonic solitary waves in the ionospheric multi-ion plasmas

We study the magnetosonic waves (MWs) propagating in magnetized plasmas comprising light warm ions, cold heavy ions and hot electrons at the Earth’s ionosphere. The dispersion relation is given and the effects of different physical parameters on the frequency of fast and slow MSWs are shown. We derive a KdV equation for the MSWs in multi-ion plasma and study the two-soliton and three-soliton overtaking collision of KdV MSWs by Hirota’s bilinear method. We show the trajectories and amplitude of solitons in this process, and the phase shift after collision. It is found that when solitons merge, it will form a new soliton whose amplitude first decreases then increases. The effects of physical parameters on the phase shift of multi-soliton collision are presented. It is worth noting that the solitons’ interaction can result in the redistribution of momentum and energy in the plasmas.

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来源期刊
Astrophysics and Space Science
Astrophysics and Space Science 地学天文-天文与天体物理
CiteScore
3.40
自引率
5.30%
发文量
106
审稿时长
2-4 weeks
期刊介绍: Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered. The journal also publishes topically selected special issues in research fields of particular scientific interest. These consist of both invited reviews and original research papers. Conference proceedings will not be considered. All papers published in the journal are subject to thorough and strict peer-reviewing. Astrophysics and Space Science features short publication times after acceptance and colour printing free of charge.
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