Positron-Acoustic Shock Waves in a Degenerate Multi-Component Plasma
Shah M. G.1** , Hossen M. R.2 , Sultana S.1 , Mamun A. A.1
1 Department of Physics, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh2 Department of Natural Sciences, Daffodil International University, Dhanmondi, Dhaka-1207, Bangladesh
Abstract ：A theoretical investigation on the propagation of positron-acoustic shock waves (PASWs) in an unmagnetized, collisionless, dense plasma (containing non-relativistic inertial cold positrons, non-relativistic or ultra-relativistic degenerate electron and hot positron fluids and nondegenerate positively charged immobile ions) is carried out by employing the reductive perturbation method. The Burgers equation and its stationary shock wave solution are derived and numerically analyzed. It is observed that the relativistic effect (i.e., the presence of non/ultra-relativistic electrons and positrons) and the plasma particle number densities play vital roles in the propagation of PASWs. The implications of our results in space and interstellar compact objects including non-rotating white dwarfs, neutron stars, etc. are briefly discussed.
收稿日期: 2014-11-06
出版日期: 2015-09-02
:
52.27.Ny
(Relativistic plasmas)
52.35.Fp
(Electrostatic waves and oscillations (e.g., ion-acoustic waves))
52.35.Tc
(Shock waves and discontinuities)
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2015, Vol. 32 
