2017/11/19 by M.S.I. Sarker, B. Hosen, Sarker, M. +7
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Dust and Plasma Wave Phenomena #FOS: Physical sciences #Plasma Physics (physics.plasm-ph) #Solar and Space Plasma Dynamics
paper · pdf · doi:10.48550/arxiv.1711.06975
openalex publication_date 2017/11/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A theoretical investigation is carried out to understand the basic features of nonlinear propagation of heavy ion-acoustic (HIA) waves subjected to an external magnetic field in an electron-positron-ion (EPI) plasma which consists of cold magnetized positively charged heavy ion fluids, and superthermal distributed electrons and positrons. In the nonlinear regime, the Korteweg-de Vries (K-dV) and modified K-dV(MK-dV) equations describing the propagation of HIA waves are derived. The latter admits a solitary wave solution with both positive and negative potentials (for K-dV equation) and only positive potential (for mK-dV equation) in the weak amplitude limit. It is observed that the effects of external magnetic field (obliqueness), superthermal electrons and positrons, different plasma species concentration, heavy ion dynamics and temperature ratio significantly modify the basic features of solitary waves (SWs). The application of the results in a magnetized EPI plasma, which occurs in many astrophysical objects (e.g., pulsars, cluster explosions, and active galactic nuclei) is briefly discussed.