Electron-acoustic solitary structures in two-electron-temperature plasma with superthermal electrons

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• 作者：H. Chen (1)
  S. Q. Liu (2) sqlgroup@ncu.edu.cn
• 关键词：Superthermal electrons &#8211 ; Electron ; acoustic solitary waves &#8211 ; Double layers &#8211 ; mKdV equation
• 刊名：Astrophysics and Space Science
• 出版时间：May 2012
• 出版年：2012
• 期刊代码：8_0004640X
• 类别：mat
• 卷：339
• 期：1
• 页码：179-184
• 数据来源：sp

摘要

The propagation of nonlinear electron-acoustic waves (EAWs) in an unmagnetized collisionless plasma system consisting of a cold electron fluid, superthermal hot electrons and stationary ions is investigated. A reductive perturbation method is employed to obtain a modified Korteweg–de Vries (mKdV) equation for the first-order potential. The small amplitude electron-acoustic solitary wave, e.g., soliton and double layer (DL) solutions are presented, and the effects of superthermal electrons on the nature of the solitons are also discussed. But the results shows that the weak stationary EA DLs cannot be supported by the present model.