Langmuir dark solitons in dense ultrarelativistic electron-positron gravito-plasma in pulsar magnetosphere

TL;DR

This paper investigates the nonlinear behavior of Langmuir dark solitons in ultrarelativistic dense electron-positron gravito-plasma near pulsar polar caps, suggesting their potential role in pulsar radio emissions.

Contribution

It derives a nonlinear Schrödinger equation for this plasma and predicts the existence of Langmuir dark solitons in such extreme conditions.

Findings

Existence of Langmuir dark solitons in ultrarelativistic gravito-plasma

Potential connection between solitons and pulsar radio emissions

Derivation of a nonlinear Schrödinger equation for the plasma

Abstract

Nonlinear propagation of electrostatic modes in ultrarelativistic dense elelectron-positron gravito-plasma at the polar cap region of pulsar magnetosphere is considered. A nonlinear Schr\"{o}dinger equation is obtained from the reductive perturbation method which predicts the existence of Langmuir dark solitons. Relevance of the propagating dark solitons to the pulsar radio emission is discussed.