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Title: Ion acoustic solitons in dense magnetized plasmas with nonrelativistic and ultrarelativistic degenerate electrons and positrons

The propagation of electrostatic waves in a dense magnetized electron-positron-ion (EPI) plasma with nonrelativistic and ultrarelativistic degenerate electrons and positrons is investigated. The linear dispersion relation is obtained for slow and fast electrostatic waves in the EPI plasma. The limiting cases for ion acoustic wave (slow) and ion cyclotron wave (fast) are also discussed. Using the reductive perturbation method, two-dimensional propagation of ion acoustic solitons is found for both the nonrelativistic and ultrarelativistic degenerate electrons and positrons. The effects of positron concentration, magnetic field, and mass of ions on ion acoustic solitons are shown in numerical plots. The proper form of Fermi temperature for nonrelativistic and ultrarelativistic degenerate electrons and positrons is employed, which has not been used in earlier published work. The present investigation is useful for the understanding of linear and nonlinear electrostatic wave propagation in the dense magnetized EPI plasma of compact stars. For illustration purposes, we have applied our results to a pulsar magnetosphere.
Authors:
; ;  [1] ;  [2]
  1. Theoretical Physics Division, PINSTECH, P. O. Nilore, Islamabad 44000 (Pakistan)
  2. Department of Physics, University of the Punjab, Lahore 54000 (Pakistan)
Publication Date:
OSTI Identifier:
22365028
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 793; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; COMPACTS; CONCENTRATION RATIO; CYCLOTRON RADIATION; DISPERSION RELATIONS; ELECTRONS; ION ACOUSTIC WAVES; IONS; MAGNETIC FIELDS; MASS; NONLINEAR PROBLEMS; PERTURBATION THEORY; POSITRONS; PULSARS; RELATIVISTIC RANGE; SOLITONS; STARS; TWO-DIMENSIONAL CALCULATIONS