Ion-acoustic solitons in warm magnetoplasmas with super-thermal electrons

TL;DR

This paper investigates ion-acoustic solitons in warm magnetoplasmas with non-thermal electrons, highlighting how electron distribution deviations influence soliton formation in space plasma environments.

Contribution

It introduces the effects of non-thermal electron distributions and multiple electron temperatures on ion-acoustic solitons in magnetoplasmas, relevant to space physics.

Findings

Non-thermal electron distributions significantly alter soliton existence regimes.

Multiple electron temperatures impact the characteristics of ion-acoustic solitons.

Results are applicable to magnetospheric plasma conditions.

Abstract

In this work, the phenomenon of formation of localised electrostatic waves (ESW) or soliton is considered in a warm magnetoplasma with the possibility of non-thermal electron distribution. The parameter regime considered here is relevant in case of magnetospheric plasmas. We show that deviation from a usual relaxed Maxwellian distribution of the electron population has a significant bearing in the allowed parameter regime, where these ESWs can be found. We further consider the presence of more than one electron temperature, which is inspired by recent space-based observations[key-2].