Dust ion acoustic solitary structures in presence of nonthermally distributed electrons and positrons

Abstract

The purpose of this paper is to extend the recent work of Paul & Bandyopadhyay

Modulational instability of ion acoustic waves in a multi-species collisionless magnetized plasma consisting of nonthermal and isothermal electrons

“…We have studied the existence of different solitary structures by considering the variation of θ and making other parameters of the system as fixed, where θ is the angle between the direction of the magnetic field and the direction of propagation of the IA wave. But in unmag-netized plasma, Paul et al [13] or in magnetized plasma, Debnath et al [9] have investigated the different solitary structures by considering the variation of Mach number M and making other parameters as fixed.…”

Dust-acoustic rogue waves in non-thermal plasmas

“…A number of authors have studied dust-acoustic (DA) waves (DAWs) [3,4,5], dust-ionacoustic waves (DIAWs) [1,2], and associated nonlinear structures in four component dusty plasma. The presence of positron drastically changes the mechanism of the formation and propagation of nonlinear electrostatic structures, viz., shock, solitons [2], super-solitons [1,7], and double layers (DLs) [2], etc.…”

“…The existence of the non-thermal particles (viz., electrons [1,2,6,7], positrons [1,2], and ions, etc. ), which rigorously change the dynamics of the plasma medium and the mechanism of the formation of various electrostatic pulses, in space plasmas has confirmed by the Viking [8] and Freja satellites [9].…”

“…Cairns et al [10] investigated the electrostatic solitary structures in a non-thermal plasma, and found that both negative and positive density perturbations can exist in the presence of nonthermal electrons. Paul et al [1] examined that the existence of non-thermal electrons and positrons in a FCEPID model supports the solitary waves of both polarities. Banerjee and Maitra [2] studied DIAWs, i.e., solitons and DLs, in a FCEPIDPM having non-thermal electrons and positrons and observed that the positive potential can not exist after a particular value of α.…”

Dust‐acoustic envelope solitons in super‐thermal plasmas

“…as well as laboratory plasmas [1] has encouraged researchers to investigate the propagation of electrostatic perturbation. Plasma physicists have encountered with dust-acoustic (DA) waves (DAWs), [1][2][3] dust-ion-acoustic (DIA) waves (DIAWs), [4] and DIA cnoidal waves (DIA-CWs) [5] as well as their associated non-linear structures such as shock, solitary, [1,2] and double layers (DLs) [6,7] to manifest the non-linear intrinsic properties of an electron-positron-ion-dust (EPID) plasma medium in the presence of highly energetic positrons. [1][2][3][4] The empirical results have shown the signature of the fast particles in the space [5][6][7][8][9] and laboratory DPM.…”