Higher Order Corrections to Kinetic Alfvén Waves in Nonthermal Plasma

Abstract

In this investigation, the formation of kinetic Alfvén (KA) solitons in nonthermal electron-positron–ion (e-p-i) plasma has been illustrated. The Korteweg-de Vries (KdV) equation is derived by using the reductive perturbation technique. Further, the inclusion of higher order (HO) such as nonlinear and dispersion effects and inhomogeneous KdV-type equation is derived. Only positive potential KA wave (KAW) solitons are evolved in the given plasma environment. The influence of plasma beta, positron density, and nonthermality of electrons and positrons has been analyzed to study the characteristics of KAW solitons. The combined impact of density, nonthermality of electrons, as well as positrons has vastly modified the characteristics of solitons as well as dressed KAW solitons. This investigation may have applications for particle acceleration and energy transportation in interstellar medium where nonthermal electron and positron pairs exist.