Arbitrary amplitude ion-acoustic solitary waves in superthermal electron-positron-ion magnetoplasma

被引：37

作者：

El-Tantawy, S. A. ^{[1
]}

El-Bedwehy, N. A. ^{[2
]}

Khan, S. ^{[3
,4
]}

Ali, S. ^{[4
]}

Moslem, W. M. ^{[1
,5
]}

机构：

[1] Port Said Univ, Fac Sci, Dept Phys, Port Said, Egypt

[2] Mansoura Univ, Fac Sci, Dept Math, Damietta El Gedida 34517, Egypt

[3] Gomal Univ, Dept Phys, Dera Ismail Khan, Pakistan

[4] NCP, Islamabad 44000, Pakistan

[5] Ruhr Univ Bochum, Int Ctr Adv Studies Phys Sci, Fac Phys & Astron, D-44780 Bochum, Germany

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2012年 / 342卷 / 02期

关键词：

Ion acoustic solitary waves; Sagdeev potential; Superthermal electrons and positrons; Magnetized plasma; SOLITONS; PLASMA;

D O I：

10.1007/s10509-012-1188-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Arbitrary amplitude ion-acoustic solitary waves propagating in a magnetized plasma composed of positive ions, superthermal electrons and positrons are investigated. For this purpose, the ions are represented by the hydrodynamical fluid equations while the non-Maxwellian electrons and positrons densities are assumed to follow kappa (kappa) distribution. The basic equations are reduced to a pseudoenergy-balance equation. Existence conditions for large amplitude solitary waves are presented. The analytical and numerical analysis of the latter show that the ion-acoustic solitary wave can propagate only in the subsonic region in our plasma system and it is significantly influenced by the plasma parameters. The present analysis could be helpful for understanding the nonlinear ion-acoustic solitary waves propagating in interstellar medium and pulsar wind, which contain an excess of superthermal particles.

引用

页码：425 / 432

页数：8

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