Electrostatic electron acoustic solitons in electron-positron-ion plasma with superthermal electrons and positrons

Jilani, K.; Mirza, Arshad M.; Khan, Tufail A.

doi:10.1007/s10509-013-1637-5

Cited by 28 publications

(10 citation statements)

References 57 publications

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“…The study of the propagation of SWs in e-p-i plasmas has drawn a significant attention in recent decades [13]- [15]. It is well established that the behavior of the linear and nonlinear waves in e-p-i plasmas have notably changed due to the presence of positrons in such electron-ion plasmas.…”

Section: Introductionmentioning

confidence: 99%

Instability Analysis of Obliquely Propagating Positron-Acoustic Solitary Waves in Superthermal Plasmas

Uddin

Alam

Masud

et al. 2015

IEEE Trans. Plasma Sci.

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The basic properties of the obliquely propagating positron-acoustic solitary waves (PASWs) and their multidimensional instability in magnetized electron-positron-ion plasmas consisting of immobile positive ions, mobile cold positrons, and superthermal (κ-distributed) hot positrons and electrons are investigated both numerically and analytically. By employing the reductive perturbation technique, the Zakharov-Kuznetsov equation is derived, which admits the solution of solitary waves. The fundamental features of PASWs are remarkably changed by the obliqueness, external magnetic field, superthermal parameter of electrons (κ e ), superthermal parameter of hot positrons (κ p ), ratio of the electron temperature to hot positron temperature (σ ), ratio of the electron number density to cold positron number density (μ e ), and ratio of the hot positron number density to cold positron number density (μ ph ). It is also found that the instability criterion and the growth rate are significantly modified by the external magnetic field and the propagation directions of both the nonlinear waves and their perturbation modes. This paper can be useful to understand the nonlinear electromagnetic perturbations in space and laboratory plasmas. Index Terms-Electron-positron-ion (e-p-i) plasmas, growth rate, instability, kappa distribution, positron-acoustic (PA) waves, solitary waves (SWs), superthermal electrons, superthermal positrons, Zakharov-Kuznetsov (ZK) equation.

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Section: Introductionmentioning

confidence: 99%

Instability Analysis of Obliquely Propagating Positron-Acoustic Solitary Waves in Superthermal Plasmas

Uddin

Alam

Masud

et al. 2015

IEEE Trans. Plasma Sci.

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“…In the earths magnetosphere, the presence of the positron component is detected by Alpha Magnetic Spectrometer in addition to the two‐component electrons. Numerous powerful strategies have been build up to study different types of non‐linear waves in e–p–i plasma during the last two decades . Recently, we addressed the problem of small amplitude EA shock waves in e–p–i plasma with the superthermal distribution of electrons and positron .…”

Section: Introductionmentioning

confidence: 99%

Effect of positron density and temperature on the electron acoustic waves in a magnetized dissipative plasma

Bansal

Aggarwal²,

Gill

2019

Contributions to Plasma Physics

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Zakharov-Kuznetsov-Burgers (ZKB) equation is derived for electron acoustic shock waves in magnetized e-p-i plasma. In the present model, magnetized plasma containing two electron population with kappa distributed positrons has been considered. The propagation characteristics of three dimensional electron acoustic (EA) shock waves have been studied under the influence of magnetic field. Our present plasma model supports the negative potential shocks. Combined action of dissipation ( ), superthermality ( ), concentration of positrons ( ), temperature ratio of cold electrons to positrons ( ), and magnetic field ( c ) significantly modify the properties of EA shock waves. The width and amplitude of the shock structures are modified by various physical parameters. It is found that shock wave width decreases with increase in , 0 , and c whereas it becomes wider for and . Further, potential of the shock wave decreases as one departs away from superthermal distribution. K E Y W O R D Sdissipative medium, electron acoustic shock waves, Zakharov-Kuznetsov-Burgers (ZKB) equation

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“…Their results have shown that both bright and dark envelopes exist in the system. Jilani et al investigated the electron acoustic solitary waves (EASWs) in four component plasma consisting of stationary ions, positrons, cold, and hot electrons with non‐thermal distribution proposed by Cairns . They numerically investigated the effects of non‐thermal distribution on the nature of the solitary waves and found that the non‐thermal character of particles enhances the phase speed of plasma waves.…”

Section: Introductionmentioning

confidence: 99%

“…We have investigated the effect of the dissipation, non‐extensivity, density ratio of hot to cold electrons, concentration of positrons, temperature difference of cold electrons, and hot electrons and positrons. Throughout this work, the kinematic viscosity is considered constant for simplicity and we shall restrict ourselves in the existence region for EAWs proposed in earlier works, where landau damping is minimized. In the next section, basic equations of our theoretical model are presented and KdVB is derived for electron acoustic waves in planar and non‐planar geometry (more realistic picture of space plasma).…”

Section: Introductionmentioning

confidence: 99%

Theoretical analysis of planar and non‐planar electron ‐ acoustic shock waves in electron‐positron‐ion plasma

Bansal

Aggarwal²,

Gill

2019

Contributions to Plasma Physics

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The propagation properties of planar and non‐planar electron acoustic shock waves composed of stationary ions, cold electrons, and q‐non‐extensive hot electrons and positrons are studied in unmagnetized electron‐positron‐ion plasma. In this model, the Korteweg‐de Vries Burgers equation is obtained in the planar and non‐planar coordinates. We have investigated the combined action of the dissipation, non‐extensivity, density ratio of hot to cold electrons, concentration of positrons, and temperature difference of cold electrons, hot electrons, and positrons. It was found that the amplitude of shock wave in e‐p‐i plasma increases when the positron concentration and temperature increase. The same effect is observed in the case of kinematic viscosity η. Furthermore, it is noticed that spherical wave moves faster in comparison to the shock waves in cylindrical geometry. This difference arises due to the presence of the geometry term m/2τ. It should be noted that the contribution of the geometry factor comes through the continuity equation. Results of our work may be helpful to illustrate the different properties of shock wave features in different astrophysical and space environments like supernova, polar regions, and in the vicinity of black holes.

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Electrostatic electron acoustic solitons in electron-positron-ion plasma with superthermal electrons and positrons

Cited by 28 publications

References 57 publications

Instability Analysis of Obliquely Propagating Positron-Acoustic Solitary Waves in Superthermal Plasmas

Instability Analysis of Obliquely Propagating Positron-Acoustic Solitary Waves in Superthermal Plasmas

Effect of positron density and temperature on the electron acoustic waves in a magnetized dissipative plasma

Theoretical analysis of planar and non‐planar electron ‐ acoustic shock waves in electron‐positron‐ion plasma

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