Abstract
The nonlinear propagation of dust-acoustic waves (DAWs) and associated dust-acoustic rogue waves (DARWs), which are governed by the nonlinear Schrödinger 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 isothermal 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 physical parameters play very crucial roles in the formation of DARWs. These results may be useful in understanding the electrostatic excitations in dusty plasmas in space and laboratory situations.
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Paul, S.K., Chowdhury, N.A., Mannan, A. et al. Dust-acoustic rogue waves in non-thermal plasmas. Pramana - J Phys 94, 58 (2020). https://doi.org/10.1007/s12043-020-1935-8
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DOI: https://doi.org/10.1007/s12043-020-1935-8