Electrostatic Nonplanar Positron-Acoustic Shock Waves in Superthermal Electron-Positron-Ion Plasmas. (1st June 2015)

• Record Type: Journal Article
• Authors: Uddin, M.J.; Alam, M.S.; Mamun, A.A.
• Is Part Of: Communications in theoretical physics. Volume 63:Number 6(2015:Jun.)
• Page Start: 754
• Page End: 760
• Publication Date: 2015-06-01
• Subjects: Physics -- Periodicals; 530.105
• Languages: English
• ISSNs: 0253-6102

Abstract

<abstract> <title>Abstract</title> <p>The basic properties of the nonlinear propagation of the nonplanar (cylindrical and spherical) positron-acoustic (PA) shock waves (SHWs) in an unmagnetized electron-positron-ion (e-p-i) plasma containing immobile positive ions, mobile cold positrons, and superthermal (kappa distributed) hot positrons and electrons are investigated both analytically and numerically. The modified Burgers equation (mBE) is derived by using the reductive perturbation method. The basic features of PA SHWs are significantly modified by the cold positron kinematic viscosity (η), superthermal parameter of electrons (κ_e), superthermal parameter of hot positrons (κ_p), the ratio of the electron temperature to hot positron temperature (σ), the ratio of the electron number density to cold positron number density and the ratio of the hot positron number density to cold positron number density (μ_ph). This study could be useful to identify the basic properties of nonlinear electrostatic disturbances in dissipative space and laboratory plasmas.</p> </abstract>