The Formation of Ion-Acoustic Solitary Waves in a Plasma Having Nonextensive Electrons and Positrons

Abstract

In this plasma model, consisting of ions, electrons and positrons have been theoretically investigated when both the electrons and positrons are obeying q-nonextensive velocity distribution. The reductive perturbation method is used to obtain a Korteweg-de Vries(KdV) equation describing the basic set of normalized fluid equations. The ion-acoustic solitary waves model are depended on nonextensive parameter, electron to positron temperature ratio, ion to electron temperature ratio and streaming velocity are investigated numerically. It has been found that solely fast ion-acoustic modes can produce the coexistence of small amplitude rarefactive solitons.

Keywords

• Reductive perturbation method
• KdV equation