Abstract This study explores the nonlinear dynamics of ion-acoustic waves (IAWs) in a magnetized, collisional, anisotropic rotating plasma that includes hot ions, superthermal electrons, and positrons. Anisotropic ion pressure is defined using the Chew–Goldberger–Low theory. Our linear analysis shows that pressure anisotropy notably impacts wave frequency, particularly for shorter wavelengths, and identifies a threshold wavenumber beyond which wave propagation is impossible. We derive a nonlinear damped Zakharov–Kuznetsov equation by applying the reductive perturbation technique. This equation describes the phase velocity and profile of ion-acoustic solitary waves, which are significantly influenced by superthermal, electron–positron temperature ratio, pressure anisotropy, the Coriolis force, and ion collisions. Our numerical analysis reveals that IAWs propagate in the plasma in a direction parallel to the magnetic field with a phase velocity that is unaffected by the plasma rotation frequency Ω 0 ₀, the magnetic field through ω c i ₂₈, or the perpendicular pressure component P ⊥ P. The phase velocity increases with the κ index and parallel pressure P ‖ P and decreases with the positron temperature ratio σ. Moreover, it is found that the wave amplitude decreases with increasing ion pressure (P ‖) (P) and the electron–positron temperature ratio (σ) (). On the contrary, the amplitude increases with rising superthermality κ, while collisions cause the wave amplitude to spread. The Coriolis force exclusively affects the width of electrostatic waves. The results of this study are particularly relevant for understanding wave behavior in astrophysical and space environments, especially within Earth’s magnetosphere, where nonthermal electrons and positrons coexist with anisotropic pressure ions.
Albalawi et al. (Wed,) studied this question.