Nonlinear propagation of an ion-acoustic dressed soliton is studied in unmagnetised plasma consisting of ion, positron and non-thermal electron. The exact soliton solution is derived using the reductive perturbation method (RPM) with the help of renormalisation procedure. This exact solution reduces to the dressed soliton solution when Mach number is expanded in terms of soliton velocity. The effects of non-thermal electrons, soliton velocity and Mach number on the characteristics (amplitude, width and product of amplitude and square of width) of the KdV soliton, core structure, dressed soliton and exact soliton are discussed in detail.

中文翻译：

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非热电子对未磁化等离子体中离子声修整孤子的影响

在由离子，正电子和非热电子组成的未磁化等离子体中研究了离子声修整孤子的非线性传播。精确的孤子解是通过归一化过程使用还原摄动法（RPM）得出的。当根据孤子速度扩展马赫数时，此精确解可简化为修整孤子解。详细讨论了非热电子，孤子速度和马赫数对KdV孤子，核结构，修整孤子和精确孤子的特性（幅度，宽度和幅度乘积和宽度的平方）的影响。