Ion-acoustic solitons in electron–positron–ion plasmas

Abstract

The ion-acoustic solitons are investigated in three-component plasmas, whose constituents are electrons, positrons, and singly charged ions. It is found that the presence of the positron component in such a multispecies plasma can result in reduction of the ion-acoustic soliton amplitudes.

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

“…Positrons are produced by pair production in high energy processes occurring in many astrophysical environments. Popel et al [9] have reported decrease in soliton amplitude in the presence of positrons. Jehan et al [13] have shown that solitons become narrower as the concentration of positron increases.…”

“…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.…”

Relativistic Degeneracy Effect on Propagation of Arbitrary Amplitude Ion-Acoustic Solitons in Thomas-Fermi Plasmas

“…Therefore to obtain a good agreement with experiments, in this method, one needs to take higher-orders in perturbation amplitudes. In recent years there have been many investigations on solitary IASWs as well as solitary electrostatic waves (ESWs) in diverse plasma environments using Sagdeev pseudo-potential approach [9][10][11][12][13]. The small amplitude propagation and interaction of IASWs with relativistic degeneracy pressure effects have been recently considered in Ref.…”

Dust ion acoustic solitary structures in presence of nonthermal electrons and isothermal positrons

“…Popel et al [23] considered the nonlinear propagation of IA waves in cold plasma consisting of cold ions, and isothermally distributed electrons and positrons. They have found the existence of compressive solitons only.…”