Non-Linear Ion-Acoustic Solitary Waves in Electron-Positron-Ion Plasma with Non-Thermal Electrons

Abstract

Ion-acoustic solitary (IAS) waves in electron-positron-ion (e-p-i) plasma have been of interest to many researchers probably due to their relevance in understanding the Universe. However, the study of non-linear ion-acoustic waves in e-p-i plasma with non-thermal electrons has not been adequately studied. A theoretical investigation on non-linear IAS waves in e-p-i plasma comprising of warm inertial adiabatic fluid ions and electrons that are kappa distributed, and Boltzman distributed positron is presented here using the Sagdeev potential technique. It was found that existence domains of finite amplitude IAS waves were confined within the limits of minimum and maximum Mach numbers with varying κ values. For lower values of κ , the amplitude of the solitary electrostatic potential structures increased as the width decreased, while for high values, the potential amplitude decreased as the width of the solitary structure increased.

Dissipative ion acoustic solitary waves in collisional, magneto‐rotating, non‐thermal electron–positron–ion plasma

“…The effects of thermal temperature and particle density on the propagation of IAWs is investigated in e-p-i plasma in refs [16,12] , where the amplitude of the structures is observed to decrease as the temperature ratio or particle concentration increases. Recently, Anguma et al [28] studied the non-linear ion acoustic solitons in e-p-i plasma with Boltzmann-distributed positrons, superthermal electrons (kappa distributed), and warm inertial ions. [17][18][19][20] Several space and astrophysical regimes, like Mercury, Saturn, solar wind, and earth magnetospheres, [21,22] contain high-energy particles with distribution functions having non-Maxwellian superthermal tails.…”