The effect of the ion temperature on large amplitude ion-acoustic waves in an electron–positron–ion plasma

Nejoh, Yasunori

doi:10.1063/1.871734

Cited by 151 publications

(62 citation statements)

References 9 publications

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“…[35,36]). Using (15) and (16) into equation (14), one obtains the nonlinear dispersion relation [35] …”

Section: Derivation Of the Nonlinear Dispersion Relationmentioning

confidence: 99%

“…Since many of the astrophysical plasmas contain ions besides the electrons and positrons, it is important to study the behavior of nonlinear wave motions in an electron-positron-ion (e-pi) plasma. During the last three decades, e-p and e-p-i a e-mail: sabryphys@yahoo.com; sabry@tp4.rub.de plasmas have attracted significant attention among researchers [10][11][12][13][14][15][16][17][18]. Linear and nonlinear wave propagation in e-p and e-p-i plasmas have been studied by using different models.…”

Section: Introductionmentioning

confidence: 99%

“…It is found that the presence of the positron component can result in the reduction of the ion-acoustic amplitude. Nejoh [15] studied the effect of the ion temperature on large-amplitude ion-acoustic waves in an e-p-i plasma. It was found that the ion temperature increases the maximum Mach number and decreases the amplitude of the ion-acoustic solitary wave.…”

Section: Introductionmentioning

confidence: 99%

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Planar and nonplanar ion-acoustic envelope solitary waves in a very dense electron-positron-ion plasma

2009

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Abstract. Ion-acoustic envelope solitary waves in a very dense plasma comprised of the electrons, positrons and ions are investigated. For this purpose, the quantum hydrodynamic model and the Poisson equation are used. A modified nonlinear Schrödinger equation is derived by employing the reductive perturbation method. The effects of the quantum correction and of the positron density on the propagation and stability of the envelope solitary waves are examined. The nonplanar (cylindrical/spherical) geometry gives rise to an instability period. The latter cannot exist for planar case and it affected by the quantum parameters, as well as the positron density. The present investigation is relevant to white dwarfs. PACS. 52.27.Cm Multicomponent and negative-ion plasmas -52.35.Fp Electrostatic waves and oscillations (e.g., ion-acoustic waves) -52.35.Mw Nonlinear phenomena: waves, wave propagation, and other interactions

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“…[35,36]). Using (15) and (16) into equation (14), one obtains the nonlinear dispersion relation [35] …”

Section: Derivation Of the Nonlinear Dispersion Relationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Planar and nonplanar ion-acoustic envelope solitary waves in a very dense electron-positron-ion plasma

2009

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“…Nonlinear ion-acoustic solitary waves in --plasma have been considered by some authors [9,20,21] assuming ions to be cold. In practice ions have finite temperature and the ionic temperature can significantly affect the characteristics of nonlinear ion-acoustic structures [10,22,23]. Chawla et al [24] have considered ion-acoustic waves in --plasma with warm adiabatic ions and isothermal electrons.…”

Section: Introductionmentioning

confidence: 99%

“…For this, over the last two decades there has been a great deal of interest in the study of nonlinear wave phenomena in --plasmas [8][9][10][11][12]. Positrons are produced by pair production in high energy processes occurring in many astrophysical environments.…”

Section: Introductionmentioning

confidence: 99%

Modulation Instability of Ion-Acoustic Waves in Plasma with Nonthermal Electrons

Ghosh

Banerjee

2014

Journal of Astrophysics

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Modulational instability of ion-acoustic waves has been theoretically investigated in an unmagnetized collisionless plasma with nonthermal electrons, Boltzmann positrons, and warm positive ions. To describe the nonlinear evolution of the wave amplitude a nonlinear Schrödinger (NLS) equation has been derived by using multiple scale perturbation technique. The nonthermal parameter, positron concentration, and ion temperature are shown to play significant role in the modulational instability of ion-acoustic waves and the formation of envelope solitons.

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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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The effect of the ion temperature on large amplitude ion-acoustic waves in an electron–positron–ion plasma

Cited by 151 publications

References 9 publications

Planar and nonplanar ion-acoustic envelope solitary waves in a very dense electron-positron-ion plasma

Planar and nonplanar ion-acoustic envelope solitary waves in a very dense electron-positron-ion plasma

Modulation Instability of Ion-Acoustic Waves in Plasma with Nonthermal Electrons

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

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