Dust Acoustic Solitary Waves in Saturn F-ring's Region

被引：22

作者：

El-Shewy, E. K. ^{[1
]}

el Maaty, M. I. Abo ^{[2
]}

Abdelwahed, H. G. ^{[1
]}

Elmessary, M. A. ^{[2
]}

机构：

[1] Mansoura Univ, Fac Sci, Theoret Phys Grp, Mansoura 35516, Egypt

[2] Mansoura Univ, Dept Math & Phys, Fac Engn, Mansoura, Egypt

来源：

COMMUNICATIONS IN THEORETICAL PHYSICS | 2011年 / 55卷 / 01期

关键词：

dust-acoustic waves; hot and cold dust charge; double layer solutions; SPACE PLASMAS; DOUBLE-LAYERS; ION; SOLITONS; HOT;

D O I：

10.1088/0253-6102/55/1/26

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Effect of hot and cold dust charge on the propagation of dust-acoustic waves (DAWs) in unmagnetized plasma having electrons, singly charged ions, hot and cold dust grains has been investigated. The reductive perturbation method is employed to reduce the basic set of fluid equations to the Kortewege-de Vries (KdV) equation. At the critical hot dusty plasma density N-h0, the KdV equation is not appropriate for describing the system. Hence, a set of stretched coordinates is considered to derive the modified KdV equation. It is found that the presence of hot and cold dust charge grains not only significantly modifies the basic properties of solitary structure, but also changes the polarity of the solitary profiles. In the vicinity of the critical hot dusty plasma density N-h0, neither KdV norm KdV equation is appropriate for describing the DAWs. Therefore, a further modified KdV (fmKdV) equation is derived, which admits both soliton and double layer solutions.

引用

页码：143 / 150

页数：8

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