Modelling of nonlinear ion-acoustic wave structures due to Martian ionospheric loss.

Kolay, Debaditya; Dutta, Debjit; Saha, Asit

The ion escape process of the ionosphere of an unmagnetized planet, Mars, gets highly stimulated by the interaction with the solar wind. A mathematical model is constructed to investigate the nonlinear dynamics of ionized particles by studying the propagation dynamics of ion-acoustic waves (IAWs) formed due to the interaction of Martian ionospheric plasma consisting of the positive ion beam ( O ) and negative ions (C l − ) with the solar wind composed by H ions and electrons. The Sagdeev Pseudopotential formalism is deployed to investigate the nonlinear properties of the ion-acoustic waves. Using the phase plane analysis, the unperturbed dynamical systems are examined for solitary as well as other nonlinear waves. The three-dimensional total energy functions are plotted to support the existence of nonlinear and super nonlinear wave structures and the existence region of the solitary waves is explored. A relevant set of plasma parameters for Martian ionospheric plasma is chosen to discuss the analytical solution of the energy equation by using the concept of the Jacobi elliptic function. The perturbed dynamical system is investigated to examine the existence of quasiperiodic and chaotic trajectories. The effects of different plasma parameters on nonlinear wave features are discussed.

NONLINEAR waves; SOLAR wind; IONOSPHERIC plasma; ION beams; ANIONS; PARTICLE dynamics; ELLIPTIC functions

Astrophysics & Space Science, 2023, Vol 368, Issue 1, p1

0004-640X

Academic Journal

10.1007/s10509-022-04161-3