Dust-acoustic rogue waves in non-thermal plasmas
Abstract
The nonlinear propagation of dust-acoustic (DA) waves (DAWs) and associated DA rogue waves (DARWs), which are governed by the nonlinear Schr\"{o}dinger equation, is theoretically investigated in a four component plasma medium containing inertial warm negatively charged dust grains and inertialess non-thermal distributed electrons as well as iso-thermal positrons and ions. The modulationally stable and unstable parametric regimes of DAWs are numerically studied for the plasma parameters. Furthermore, the effects of temperature ratios of ion-to-electron and ion-to-positron, and the number density of ion and dust grains on the DARWs are investigated. It is observed that the physical parameters play a very crucial role in the formation of DARWs. These results may be useful in understanding the electrostatic excitations in dusty plasmas in space and laboratory situations.
Keywords
Cite
@article{arxiv.1911.12386,
title = {Dust-acoustic rogue waves in non-thermal plasmas},
author = {S. K. Paul and N. A. Chowdhury and A. Mannan and A. A. Mamun},
journal= {arXiv preprint arXiv:1911.12386},
year = {2020}
}
Comments
5 pages; 5 figures. arXiv admin note: text overlap with arXiv:1910.02475, arXiv:1911.08557