Dynamics of nonlinear ion-waves in Fermi-Dirac electron-positron-ion magnetoplasmas

TL;DR

This paper investigates the behavior of nonlinear ion-waves in dense, magnetized Fermi-Dirac electron-positron-ion plasmas, focusing on soliton interactions and their dependence on plasma parameters relevant to astrophysical objects.

Contribution

It introduces a quantum hydrodynamics model to analyze oblique propagation and collisions of solitary waves in relativistic dense plasmas, providing new insights into their phase-shifts and characteristics.

Findings

Phase-shift variations depend on plasma parameters.

Soliton amplitude and width are affected by magnetic field strength.

Results are relevant for understanding dense astrophysical objects like white-dwarfs.

Abstract

Oblique propagation and head-on collisions of solitary structures is studied in a dense magnetized plasma comprised of relativistic ultra-cold electrons and positrons and positive dynamic ions using conventional extended multi-scales technique, in the ground of quantum hydrodynamics model. The variations of head-on collision phase-shift as well as the characteristic soliton amplitude and width is evaluated numerically in terms of other plasma parameters such as mass-density, normalized magnetic field strength, its angle with respect to the soliton propagation and the relative positron number-density. The relevance of current investigations, with appropriate plasma parameters for the astrophysical dense magnetized objects such as white-dwarfs, is addressed.