On the Oblique Propagation of Large Amplitude Dust-Acoustic Solitary Waves in Anisotropic Polarized Magnetoplasma

Abstract

This study comprehensively investigates the oblique propagation of arbitrary dust-acoustic solitary waves (DASWs) in an anisotropic polarized complex magnetoplasma. The model consists of Maxwellian electrons and ions as well as inertial hot dust fluid. The hot dust is presumed to exhibit adiabatic behavior, distinguished by anisotropic thermal pressure. The linear dispersion relation (LDR) for both dust-cyclotron waves (DCWs) and dust-acoustic waves (DAWs) is obtained and investigated numerically using the plane wave approximation. The analysis applies Sagdeev’s pseudopotential theory to the fluid equations of the plasma model and simplifies them into the energy equation. Various factors, including polarization force, ions-to-electron temperature ratio, dust concentration, and dust pressure anisotropy, are considered to explore their influence on solitary waves’ existence and propagation characteristics (amplitude, width). The results reveal the presence of only rarefactive DASWs. This study provides valuable insights into wave phenomena in polarized magnetized plasmas and holds potential applications in space-dusty plasma environments like Saturn’s F rings.