Solitary structures with ion and electron thermal anisotropy

TL;DR

This paper investigates the formation of electrostatic solitary structures in magnetized plasma considering ion and electron thermal anisotropies, revealing that negative electron anisotropy promotes large amplitude structures consistent with observations.

Contribution

It introduces a model combining CGL equations for ions and bi-Maxwellian electrons to analyze solitary structures with anisotropic thermal effects.

Findings

Negative electron thermal anisotropy facilitates large amplitude solitary structures.

The model's results align with observational data.

Ion anisotropy modeled via CGL equations influences structure formation.

Abstract

Formation of electrostatic solitary structures are analysed for a magnetised plasma with ion and electron thermal anisotropies. The ion thermal anisotropy is modelled with the help of the Chew-Goldberger-Low (CGL) double adiabatic equations of state while the electrons are treated as inertia-less species with an anisotropic bi-Maxwellian velocity distribution function. A negative electron thermal anisotropy $(T_{e\perp}/T_e{\parallel}>1)$ is found to help form large amplitude solitary structures which are in agreement with observational data.