1D planar, cylindrical and spherical subsonic solitary waves in space electron-ion-positive dust plasma systems

TL;DR

This paper investigates the properties and evolution of subsonic solitary waves in a space electron-ion-positive dust plasma system, highlighting how positive dust affects wave speed and the distinct behaviors of cylindrical and spherical waves.

Contribution

It introduces a detailed analysis of 1D planar, cylindrical, and spherical subsonic solitary waves in space dusty plasmas, emphasizing the impact of positive dust on wave dynamics and evolution.

Findings

Positive dust reduces ion-acoustic wave phase speed.

Subsonic solitary waves with positive potential are supported.

Spherical waves evolve faster than cylindrical ones.

Abstract

The space electron-ion-positive dust plasma system containing isothermal inertialess electron species, cold inertial ion species, and stationary positive (positivively charged) dust species is considered. The basic features of one dimensional (1D) planar and nonplanar subsonic solitary waves are investigated by the pseudo-potential and reductive perturbation methods, respectively. It is observed that the presence of the positive dust species reduces the phase speed of the ion-acoustic waves, and consequently supports the subsonic solitary waves with the positive wave potential in such a space dusty plasma system. It is observed that the cylindrical and spherical subsonic solitary waves significantly evolve with time, and that the time evolution of the spherical solitary waves is faster than that of the cylindrical ones. The applications of the work in many space dusty plasma systems, particularly in Earth's mesosphere, cometary tails, Jupiter's magnetosphere, etc. are addressed.