Nonlinear ion acoustic solitary waves with dynamical behaviours in the relativistic plasmas

• Published in: Astrophysics and space science Vol. 365; no. 5
• Main Author: Hafez, M. G.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.05.2020; Springer Nature B.V
• Subjects: Astrobiology; Astronomy; Astrophysics; Astrophysics and Astroparticles; Collisionless plasmas; Cosmology; Ions; Lorentz factor; Observations and Techniques; Original Article; Physics; Physics and Astronomy; Plasma; Polarity; Positrons; Relativistic effects; Relativistic plasmas; Relativistic theory; Solitary waves; Space Exploration and Astronautics; Space Sciences (including Extraterrestrial Physics; Electron-positron-ion plasma; Soliton; Korteweg-de Vries-type Schamel equation; Relativistic effect
• ISSN: 0004-640X; 1572-946X
• DOI: 10.1007/s10509-020-03791-9

This work investigates the basic features of Nonlinear Ion Acoustic Solitary waves (NIASWs) and their dynamical behaviours in an unmagnetized relativistic collisionless plasma system via the Schamel Korteweg-de Vries (SKdV) equation. Such plasma is composed by the generalized distributed electrons, Boltzmann distributed positrons and relativistic warm ions. The influences of plasma parameters on NIASWs and their dynamical behaviours are investigated by comparing 26−term expansion of relativistic Lorentz factor (RLF) with both of weakly (2−term expansion of RLF) and highly (3−term expansion of RLF) regimes. It is found that the 26−term expansion of RLF are significantly changed NIASWs instead of both weakly and highly relativistic regimes. Therefore, the theoretical results would be very useful for understanding the nature (amplitude, width, polarity, etc.) of wave dynamics not only in astrophysical and space environments but also in further laboratory studies, where the proposed plasma assumptions are existed.