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Title: Modulational instability of spin modified quantum magnetosonic waves in Fermi-Dirac-Pauli plasmas

A theoretical and numerical study of the modulational instability of large amplitude quantum magnetosonic waves (QMWs) in a relativistically degenerate plasma is presented. A modified nonlinear Schrödinger equation is derived by using the reductive perturbation method. The modulational instability regions of the QMWs and the corresponding growth rates are significantly affected by the relativistic degeneracy parameter, the Pauli spin magnetization effects, and the equilibrium magnetic field. The dynamics and nonlinear saturation of the modulational instability of QMWs are investigated numerically. It is found that the increase of the relativistic degeneracy parameter can increase the growth rate of the instability, and the system is saturated nonlinearly by the formation of envelope solitary waves. The current investigation may have relevance to astrophysical magnetized compact objects, such as white dwarfs and pulsar magnetospheres.
Authors:
 [1] ;  [2] ;  [1] ;  [3]
  1. Department of Physics, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083 (China)
  2. (Germany)
  3. Physics Department, John Anderson Building, University of Strathclyde, Glasgow G4 0NG, Scotland (United Kingdom)
Publication Date:
OSTI Identifier:
22218415
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 11; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ASTROPHYSICS; MAGNETIC FIELDS; MAGNETIZATION; MAGNETOACOUSTIC WAVES; MAGNETOHYDRODYNAMICS; NONLINEAR PROBLEMS; NUMERICAL ANALYSIS; PERTURBATION THEORY; PLASMA INSTABILITY; PLASMA WAVES; PULSARS; RELATIVISTIC PLASMA; SCHROEDINGER EQUATION; SPIN; WHITE DWARF STARS