Nonlinear ion acoustic rogue waves in a superthermal electron-positron-ion plasma

被引：1

作者：

Lin, M. M. ^{[1
]}

Yu, T. X. ^{[1
]}

Wen, H. S. ^{[1
]}

Song, Q. Y. ^{[1
]}

Du, H. S. ^{[1
]}

机构：

[1] Northwest Normal Univ, Dept Phys, Lanzhou 730070, Peoples R China

来源：

INDIAN JOURNAL OF PHYSICS | 2022年 / 96卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Ion acoustic rogue waves; Nonlinear Schrodinger equation; Ion acoustic wave; Rogue wave; SOLITARY WAVES; DUSTY PLASMAS; CHARGE;

D O I：

10.1007/s12648-020-01947-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper, the nonlinear ion acoustic rogue waves (IARWs) are investigated in an unmagnetized, collisionless plasma which consist of positive ions, superthermal electrons and positrons, respectively. A nonlinear Schrodinger equation (NLSE) of IAW packets has been obtained by using the reductive perturbation technique. Furthermore, the effects of superthermal electrons and positrons on the nonlinear dispersion relation, the group velocity and the modulational instability of nonlinear ion acoustic wave (IAW) packets have been studied in detail. At the same time, the characteristics of first- and second-order IARW also have been discussed. It seems that there is some significant influence of superthermal electrons and positrons on the nonlinear ion acoustic waves. Meanwhile, it is also found that the first- and second-order IARW consisting of Peregrine breathers can be excited by using the modulational instability in this system.

引用

页码：233 / 241

页数：9

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