scholarly journals Propagation of Electrostatic Solitary Wave Structures in Dense Astrophysical Plasma: Effects of Relativistic Drifts & Relativistic Degeneracy Pressure

2016 ◽  
Vol 1 (3) ◽  
Author(s):  
Swarniv Chandra ◽  
◽  
Keyword(s):  
Solitary Wave ◽  
Astrophysical Plasma ◽  
Relativistic Degeneracy ◽  
Plasma Effects ◽  
Degeneracy Pressure

Modulationally stable envelope solitons in astrophysical magnetoplasmas with degenerate relativistic electrons

2015 ◽  
Vol 81 (6) ◽  
Author(s):  
M. Irfan ◽  
S. Ali ◽  
Arshad M. Mirza ◽  
Yunliang Wang
Keyword(s):  
Perturbation Technique ◽  
Vital Role ◽  
Relativistic Electrons ◽  
Nls Equation ◽  
Weakly Nonlinear ◽  
Relativistic Degeneracy ◽  
Degeneracy Pressure ◽  
Relativistic Parameter ◽  
The One ◽  
Collective Interactions

The formation and propagation characteristics of small-amplitude magnetoacoustic dark/grey solitons are investigated in a semi relativistic degenerate magnetoplasma whose constituents are electrons and singly ionized positive ions. For this purpose, the electrons are assumed to follow the degeneracy pressure law through the Chandrasekhar equation of state, while the inertial cold ions are taken as non-degenerate and magnetized. By solving the one-fluid quantum magnetohydrodynamic (QMHD) model with the aid of a reductive perturbation technique, a nonlinear Schrödinger (NLS) equation is derived for weakly nonlinear envelope magnetoacoustic solitons. The NLS equation admits the existence of stable excitations, e.g. dark and grey solitons for which the condition $P/Q<0$ holds. Numerical results reveal that the variation of plasma number density, magnetic field strength, relativistic parameter $({\it\eta}_{e0})$ and the quantum parameter $(H)$ significantly modify the profiles of the envelope magnetoacoustic solitons. The present results are important to understanding of the nonlinear dynamics of magnetoacoustic solitons in astrophysical dense magnetoplasmas (viz., white dwarfs, magnetars, neutron stars, etc.), where the relativistic degeneracy effects play a vital role in collective interactions.

Extraordinary and upper-hybrid waves in spin quantum magnetoplasmas with vacuum polarization effect

2021 ◽  
Vol 87 (4) ◽  
Author(s):  
Jun Zhu ◽  
Xiaoshan Liu ◽  
Yuee Luo
Keyword(s):  
Polarization Effect ◽  
Vacuum Polarization ◽  
Spin Current ◽  
Extraordinary Wave ◽  
Polarization Current ◽  
Relativistic Degeneracy ◽  
Bohm Potential ◽  
Spin Quantum ◽  
Degeneracy Pressure ◽  
Hybrid Waves

The propagation of extraordinary and upper-hybrid waves in spin quantum magnetoplasmas with vacuum polarization effect is investigated. Based on the quantum magnetohydrodynamics model including Bohm potential, arbitrary relativistic degeneracy pressure and spin force, and Maxwell's equations modified by the spin current and vacuum polarization current, the dispersion relations of extraordinary and upper-hybrid waves are derived. The analytical and numerical results show that quantum effects (Bohm potential, degeneracy pressure and spin magnetization energy) and the vacuum polarization effect modify the propagation of the extraordinary wave. Under the action of a strong magnetic field, the plasma frequency is obviously increased by the vacuum polarization effect.

PLASMA EFFECTS IN ION BEAM TARGET INTERACTION

1983 ◽  
Vol 44 (C8) ◽  
pp. C8-93-C8-106 ◽  
Author(s):  
E. Nardi ◽  
Z. Zinamon
Keyword(s):  
Ion Beam ◽  
Target Interaction ◽  
Plasma Effects

On the Exact Soliton Solutions of Some Nonlinear PDE by Tan-Cot Method

2018 ◽  
Vol 5 (1) ◽  
pp. 31-36
Author(s):  
Md Monirul Islam ◽  
Muztuba Ahbab ◽  
Md Robiul Islam ◽  
Md Humayun Kabir
Keyword(s):  
Solitary Wave ◽  
Acoustic Waves ◽  
Water Waves ◽  
Wave Equations ◽  
Rectangular Channel ◽  
Soliton Solutions ◽  
Boussinesq Equations ◽  
Travelling Wave ◽  
Ion Acoustic Waves ◽  
Analytical System

For many solitary wave applications, various approximate models have been proposed. Certainly, the most famous solitary wave equations are the K-dV, BBM and Boussinesq equations. The K-dV equation was originally derived to describe shallow water waves in a rectangular channel. Surprisingly, the equation also models ion-acoustic waves and magneto-hydrodynamic waves in plasmas, waves in elastic rods, equatorial planetary waves, acoustic waves on a crystal lattice, and more. If we describe all of the above situation, we must be needed a solution function of their governing equations. The Tan-cot method is applied to obtain exact travelling wave solutions to the generalized Korteweg-de Vries (gK-dV) equation and generalized Benjamin-Bona- Mahony (BBM) equation which are important equations to evaluate wide variety of physical applications. In this paper we described the soliton behavior of gK-dV and BBM equations by analytical system especially using Tan-cot method and shown in graphically. GUB JOURNAL OF SCIENCE AND ENGINEERING, Vol 5(1), Dec 2018 P 31-36

Ferromagnetic resonance and plasma effects in metals

1967 ◽  
Vol 92 (8) ◽  
pp. 583-619 ◽  
Author(s):  
A.Ya. Blank ◽  
M.I. Kaganov
Keyword(s):  
Ferromagnetic Resonance ◽  
Plasma Effects

Experimental study of interaction of a surface solitary wave with an underwater step

2018 ◽  
Vol 1(91) (1) ◽  
pp. 42-52
Author(s):  
A.S. Kotelnikova ◽  
◽  
V.I. Nikishov ◽  
S.M. Sribnyuk ◽  
◽  
...  
Keyword(s):  
Experimental Study ◽  
Solitary Wave
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