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Title: Oblique propagation of ion-acoustic solitary waves in a magnetized electron-positron-ion plasma

The properties of obliquely propagating ion-acoustic solitary waves in the presence of ambient magnetic field have been investigated theoretically in an electron-positron-ion nonthermal plasma. The plasma nonthermality is introduced via the q-nonextensive distribution of electrons and positrons. The Korteweg-de Vries (K-dV) and modified K-dV (mK-dV) equations are derived by adopting reductive perturbation method. The solution of K-dV and modified K-dV equation, which describes the solitary wave characteristics in the long wavelength limit, is obtained by steady state approach. It is seen that the electron and positron nonextensivity and external magnetic field (obliqueness) have significant effects on the characteristics of solitary waves. A critical value of nonextensivity is found for which solitary structures transit from positive to negative potential. The findings of this investigation may be used in understanding the wave propagation in laboratory and space plasmas where static external magnetic field is present.
Authors:
; ;  [1]
  1. Department of Physics, Jahangirnagar University, Savar, Dhaka-1342 (Bangladesh)
Publication Date:
OSTI Identifier:
22408189
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 3; Other Information: (c) 2015 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; COLD PLASMA; ELECTRONS; IONS; KORTEWEG-DE VRIES EQUATION; MAGNETIC FIELDS; MATHEMATICAL SOLUTIONS; PERTURBATION THEORY; POSITRONS; SOUND WAVES; STEADY-STATE CONDITIONS; WAVE PROPAGATION; WAVELENGTHS