空间电子-离子-正尘埃等离子体系统中的一维平面、柱面和球面亚音速孤立波
1D planar, cylindrical and spherical subsonic solitary waves in space electron-ion-positive dust plasma systems
摘要：
本文研究了空间电子-离子-正尘埃等离子体系统，系统中含有等温的无惯性电子种、冷惯性离子种和静止的正尘埃种。分别用赝势和约化微扰法研究了一维平面和非平面亚音速孤立波的基本特征。结果表明，正尘埃粒子的存在降低了离子声波的相速度，从而支持了具有正波势的亚音速孤立波.结果表明，圆柱形和球形亚音速孤立波都随时间发生了显著的演化，球形孤立波的演化速度比圆柱形孤立波快。本文介绍了这一工作在许多空间尘埃等离子体系统中的应用，特别是在地球的中间层、彗星的尾部、木星的磁层等。
英文摘要：
The space electron-ion-positive dust plasma system containing isothermal inertialess electron species, cold inertial ion species, and stationary positive (positivively charged) dust species is considered. The basic features of one dimensional (1D) planar and nonplanar subsonic solitary waves are investigated by the pseudo-potential and reductive perturbation methods, respectively. It is observed that the presence of the positive dust species reduces the phase speed of the ion-acoustic waves, and consequently supports the subsonic solitary waves with the positive wave potential in such a space dusty plasma system. It is observed that the cylindrical and spherical subsonic solitary waves significantly evolve with time, and that the time evolution of the spherical solitary waves is faster than that of the cylindrical ones. The applications of the work in many space dusty plasma systems, particularly in Earth's mesosphere, cometary tails, Jupiter's magnetosphere, etc. are addressed.
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