The interaction of two nonplanar solitary waves in electron-positron-ion plasmas: An application in active galactic nuclei

In the present research paper, the effect of bounded nonplanar (cylindrical and spherical) geometry
on the interaction between two nonplanar electrostatic solitary waves (NESWs) in electron–
positron–ion plasmas has been studied. The extended Poincare–Lighthill–Kuo method is used to
obtain nonplanar phase shifts after the interaction of the two NESWs. This study is a first attempt
to investigate nonplanar phase shifts and trajectories for NESWs in a two-fluid plasma (a pairplasma)
consisting of electrons and positrons, as well as immobile background positive ions in
nonplanar geometry. The change of phase shifts and trajectories for NESWs due to the effect of
cylindrical geometry, spherical geometry, the physical processes (either isothermal or adiabatic),
and the positions of two NESWs are discussed. The present investigation may be beneficial to
understand the interaction between two NESWs that may occur in active galactic nuclei.