Propagation of three-dimensional ion-acoustic solitary waves in magnetized negative ion plasmas with nonthermal electrons

AbstractInvestigation of arbitrary amplitude nonlinear ion-acoustic solitary waves which accompany collisionless positive–negative ion plasmas with high-energy electrons (represented by kappa distribution) is presented. Arbitrary amplitude solitary waves are investigated by deriving an energy-integral equation involving a Sagdeev-like pseudopotential. The existence regions of solitary pulses are, defined precisely, modified by the superthermality of energetic electrons. Furthermore, numerical calculations reveal that both compressive and rarefactive pulses may exist for negative ion mass groups in Titan's atmosphere. The superthermality of energetic electrons are found to modify the existence domains of large amplitude ion-acoustic waves in Titan's atmosphere. The dependence of solitary excitation characteristics on the superthermal parameter, the negative ion concentration, the positive-to-negative ions mass ratio, and the Mach number have been investigated. The present study might be helpful to understand the excitation of fully nonlinear ion-acoustic solitary pulses that may appear in the interplanetary medium and/or in the astrophysical plasmas in general.

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Analytical study on the existence of ion-acoustic solitary waves in a plasma consisting of warm streaming ions and nonthermal electrons

Indian Journal of Physics ◽

10.1007/s12648-012-0045-y ◽

2012 ◽

Vol 86 (5) ◽

pp. 395-400 ◽

Cited By ~ 4

Author(s):

I. Paul ◽

G. Pakira ◽

S. K. Chattopadhyay ◽

S. N. Paul ◽

B. Ghosh

Keyword(s):

Solitary Waves ◽

Analytical Study ◽

Nonthermal Electrons ◽

Ion Acoustic Solitary Waves ◽

Ion Acoustic

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Large amplitude ion-acoustic solitary waves in a warm negative ion plasma with superthermal electrons: The fast mode revisited

AIP Advances ◽

10.1063/1.5127199 ◽

2020 ◽

Vol 10 (6) ◽

pp. 065305

Author(s):

X. Mushinzimana ◽

F. Nsengiyumva

Keyword(s):

Solitary Waves ◽

Large Amplitude ◽

Negative Ion ◽

Fast Mode ◽

Superthermal Electrons ◽

Ion Plasma ◽

Ion Acoustic Solitary Waves ◽

Ion Acoustic

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Ion-acoustic waves in a degenerate multicomponent magnetoplasma

Journal of Plasma Physics ◽

10.1017/s0022377812000803 ◽

2012 ◽

Vol 79 (2) ◽

pp. 163-168 ◽

Cited By ~ 8

Author(s):

U. M. ABDELSALAM ◽

M. M. SELIM

Keyword(s):

Solitary Waves ◽

Acoustic Waves ◽

Three Dimensional ◽

Negative Ions ◽

Expansion Method ◽

Reductive Perturbation Method ◽

Negative Ion ◽

Zk Equation ◽

Ion Acoustic ◽

Astrophysical Objects

AbstractThe hydrodynamic equations of positive and negative ions, degenerate electrons, and the Poisson equation are used along with the reductive perturbation method to derive the three-dimensional Zakharov–Kuznetsov (ZK) equation. The G′/G-expansion method is used to obtain a new class of solutions for the ZK equation. At certain condition, these solutions can describe the solitary waves that propagate in our plasma. The effects of negative ion concentrations, the positive/negative ion cyclotron frequency, as well as positive-to-negative ion mass ratio on solitary pulses are examined. Finally, the present study might be helpful to understand the propagation of nonlinear ion-acoustic solitary waves in a dense plasma, such as in astrophysical objects.

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