Abstract
This present investigation has been instigated to examine the impact of polarization force on modulational instability of dust acoustic (DA) waves and transition of rogue wave triplets to super rogue waves in dusty plasma composed of negative dust as fluid, Boltzmannian electrons, and superthermal ions. The presence of superthermal ions has remarkably altered the impact of polarization force. An increment in ion superthermality index restricts the polarization parameter toward smaller values. By adopting the reductive perturbation technique, the nonlinear Schrödinger equation (NLSE) is procured that determines the modulational instability of the dust acoustic waves. It is observed that the effect of polarization force is constricted by the wavenumber domain in the advent of the instability region. The rational solution of NLSE describes the evolution of dust acoustic rogue wave triplets, which further transform into the super rogue waves by means of superposition of triplets. It is remarked that the amalgamation of polarization force and superthermal ions have an explicit impact on the characteristics of different kinds of dust acoustic rogue waves. It is intensified that our present theoretical pronouncements may shed light on the salient features of different kinds of DA rogue waves in laboratory experiments and space/astrophysical regions, especially in Saturn's magnetosphere, planetary rings, and comet tails, etc.
Original language | English |
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Article number | 113702 |
Journal | Physics of Plasmas |
Volume | 26 |
Issue number | 11 |
DOIs | |
State | Published - Nov 1 2019 |
Externally published | Yes |
Funding
Kuldeep Singh acknowledges the UGC for BSR fellowship. The authors also acknowledge the support by DRS-II (SAP) No. F 530/ 17/DRS-II/2015(SAP-I) UGC, New Delhi.
Funders | Funder number |
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DRS-II |