Ion acoustic solitary wave in electron-positron-ion plasma: effect of Landau damping

被引：35

作者：

Ghosh, Samiran ^{[1
]}

Bharuthram, R. ^{[2
]}

机构：

[1] Univ Calcutta, Dept Appl Math, Kolkata 700009, W Bengal, India

[2] Univ Western Cape, ZA-7530 Bellville, South Africa

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2011年 / 331卷 / 01期

关键词：

Electron-positron-ion plasma; Ion acoustic solitary wave; Landau damping; ELECTROMAGNETIC-WAVES; MAGNETIC-FIELD; DOUBLE-LAYERS; SOLITONS;

D O I：

10.1007/s10509-010-0443-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A Korteweg-de Vries (KdV) equation with a linear Landau damping term describing weakly nonlinear and weakly dispersive ion-acoustic waves in an electron-positron-ion plasma is derived. It is found that the Landau damping causes the solitary wave amplitude to decay with time. It is also found that in absence of Landau damping, both linear wave phase velocity and solitary wave amplitude decrease with the increase of positron density, whereas, both increase with the increase of positron temperature. On the other hand, the Landau damping rate decreases with the increase of both positron density and temperature.

引用

页码：163 / 168

页数：6

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