The propagation of ion acoustic (IA) solitary waves is investigated in a magnetized electron‐positron‐ion (EPI) plasma with Tsalli distributed electrons and Maxwellian positrons. A non‐linear Korteweg–de Vries (KdV)‐type equation is derived for the potential by using the reductive perturbation method (RPM), and its solitary wave solution is analysed. For a given set of plasma parameters, the present model supports only compressive IA solitary structures. It is found that the variation of various relevant plasma parameters, like the nonextensive parameter q, temperature ratio σ, direction cosine l_z, the positron concentration γ and the magnetic field strength Ω significantly alter the characteristic properties of IA solitary waves.

中文翻译：

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具有Tsallis分布电子的磁化电子-正电子-离子等离子体中的离子声孤波

在具有Tsalli分布电子和Maxwellian正电子的磁化电子-正电子（EPI）等离子体中研究了离子声（IA）孤波的传播。利用还原摄动法（RPM）导出了一个非线性的Korteweg-de Vries（KdV）型方程，并分析了其孤立波解。对于给定的一组血浆参数，本模型仅支持压缩IA孤立结构。发现各种相关等离子体参数的变化，如非扩展参数q，温度比σ，方向余弦l _z，正电子浓度γ和磁场强度Ω 大大改变了IA孤波的特性。