Journal ArticleDOI
Electrostatic solitons in multispecies electron-positron plasmas
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In this paper, the Sagdeev potential is used to integrate the equations of electron-positron plasmas with equal hot and cool components of both species, where the hot components are isothermal Boltzmann distributed, and the cool components are modelled by adiabatic fluids.Abstract:
Acoustic solitons are investigated in electron-positron plasmas containing equal hot and cool components of both species. The hot components are isothermal Boltzmann distributed, the cool constituents are modelled by adiabatic fluids. The equations are integrated exactly in terms of a Sagdeev potential. Solitons are shown to be possible, but no double layers, due to the symmetry in the model. Bearing in mind the constraints imposed by the Boltzmann assumption, small amplitude solitons only are found. Such findings are relevant for different kinds of astrophysical plasmas, as well as for other types of similar acoustic solitons.read more
Citations
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Head-on collision of ion acoustic solitary waves in an electron-positron-ion plasma with superthermal electrons
Prasanta Chatterjee,Uday Narayan Ghosh,Kaushik Roy,Sithi V. Muniandy,Chiow San Wong,Biswajit Sahu +5 more
TL;DR: In this paper, the effects of the ratio of electron temperature to positron temperature, the spectral index, κ, of the electron kappa distribution, and fractional concentration of positron component (p) on the phase shift are studied.
Journal ArticleDOI
Existence of bulk acoustic modes in pair plasmas
TL;DR: In this article, a thorough discussion of the dispersion of linear electrostatic waves, before finding the parameter ranges in which stationary nonlinear electrostatic modes can exist, when there is a thermodynamic asymmetry between both constituents.
Journal ArticleDOI
Nonlinear acoustic waves in nonthermal plasmas with negative and positive dust
TL;DR: Using a Sagdeev pseudopotential formalism where nonlinear structures are stationary in a co-moving frame, large dust-acoustic solitary waves and double layers have been studied in plasmas with negative and positive cold dust, in the presence of nonthermal electrons and ions.
Journal ArticleDOI
Nonlinear excitations in electron-positron-ion plasmas in accretion disks of active galactic nuclei
TL;DR: In this article, the propagation of acoustic nonlinear excitations in an electron-positron-ion (e-p-i) plasma composed of warm electrons and positrons, as well as hot ions, has been investigated by adopting a two-dimensional cylindrical geometry.
Journal ArticleDOI
Ion acoustic shock waves in electron-positron-ion quantum plasma
TL;DR: In this paper, an unmagnetized quantum plasma consisting of electrons, positrons, and ions employing the quantum hydrodynamic (QHD) model employing the small amplitude perturbation expansion method was studied.
References
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Journal ArticleDOI
Ion Acoustic Soliton in Plasma with Negative Ion
TL;DR: In this article, the transition from the Korteweg-de Vries soliton to the modified Korthe-de-Vries (MKV) soliton is studied by means of an evolution equation with quadratic and cubic nonlinearities.
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Arbitrary-amplitude electron-acoustic solitons in a two-electron-component plasma
TL;DR: In this article, electron-acoustic solitons in a plasma consisting of fluid ions, a cool fluid electron and a hot Boltzmann electron component were constructed using the reductive perturbation technique.
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Large amplitude ion‐acoustic double layers in a double Maxwellian electron plasma
R. Bharuthram,Padma Kant Shukla +1 more
TL;DR: In this article, a finite amplitude theory for an ion-acoustic double layer (DL) in a plasma with cold ions and two distinct groups of Boltzmann-Maxwellian distributed hot electrons is presented.
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Cut-off conditions and existence domains for large-amplitude ion-acoustic solitons and double layers in fluid plasmas
TL;DR: In this article, the existence domains for arbitrary-amplitude ion-acoustic solitons and double layers are determined numerically by cut-off conditions on the corresponding Sagdeev potential.