Dust-acoustic wave electrostatic and self-gravitational potentials in an opposite polarity dusty plasma system

TL;DR

This paper investigates the electrostatic and self-gravitational potentials of dust-acoustic waves in an opposite polarity dusty plasma, using numerical analysis of coupled nonlinear differential equations relevant to space and laboratory conditions.

Contribution

It introduces a detailed numerical analysis of coupled nonlinear equations for dust-acoustic potentials in opposite polarity dusty plasmas, highlighting their basic features and relevance.

Findings

Self-gravitational potential differs from electrostatic potential in behavior.

Numerical solutions reveal distinct characteristics of dust-acoustic waves.

Results applicable to space and laboratory plasma systems.

Abstract

An opposite polarity dusty plasma system (containing a few micron size massive opposite polarity dust species and singly charged ion species following Boltzmann law) is considered. The nature of dust-acoustic (DA) wave electrostatic and self-gravitational potentials are correctly found by the numerical analysis of two coupled second-order nonlinear differential equations for electrostatic and self-gravitational potentials associated with the DA waves in such an opposite polarity dusty plasma medium. These coupled nonlinear differential equations are derived from the continuity and momentum equations for positive and negative dust species, and the Boltzmann law for ion species. The basic features of the DA wave self-gravitational potential are compared with that of the DA wave electrostatic potential. The relevance of our results to space and laboratory opposite polarity dusty plasma systems is mentioned.