Degenerate pressure driven self-gravito-acoustic solitary waves in a self-gravitating degenerate quantum plasma system

2018 ◽  
Vol 25 (2) ◽  
pp. 022307 ◽  
Author(s):  
A. A. Mamun
Keyword(s):  
Solitary Waves ◽  
Quantum Plasma ◽  
Plasma System ◽  
Degenerate Pressure ◽  
Pressure Driven

Planar and non-planar nucleus-acoustic solitary waves in warm degenerate multi-nucleus plasmas

2021 ◽  
Vol 87 (1) ◽  
Author(s):  
A. A. Mamun ◽  
J. Akter
Keyword(s):  
Solitary Waves ◽  
White Dwarf ◽  
Acoustic Waves ◽  
White Dwarfs ◽  
Reductive Perturbation Method ◽  
Degenerate Electron ◽  
Degenerate Plasma ◽  
Degenerate Pressure ◽  
Basic Features ◽  
Pressure Driven

A warm degenerate plasma (containing ultra-relativistically or non-relativistically warm degenerate inertia-less electron species, non-relativistically warm degenerate inertial light nucleus species and stationary heavy nucleus species) is considered. The basic features of planar and non-planar solitary structures associated with the degenerate pressure-driven nucleus-acoustic waves propagating in such a warm degenerate plasma system are investigated. The reductive perturbation method, which is valid for small- but finite-amplitude solitary waves, is used. It is found that the effects of non-planar cylindrical and spherical geometries, non- and ultra-relativistically degenerate electron species and the temperature of degenerate electron species significantly modify the basic features (i.e. speed, amplitude and width) of the solitary potential structures associated with degenerate pressure-driven nucleus-acoustic waves. The warm degenerate plasma model under consideration is applicable not only to all cold white dwarfs, but also to many hot white dwarfs, such as DQ white dwarfs, white dwarf H1504+65, white dwarf PG 0948+534, etc.

Three-Dimensional Self-Gravito-Acoustic Solitary Waves in a Degenerate Quantum Plasma System

2020 ◽  
Vol 46 (2) ◽  
pp. 195-199
Author(s):  
A. Mannan ◽  
S. Sultana ◽  
R. Schlickeiser ◽  
T. Dohnal
Keyword(s):  
Solitary Waves ◽  
Three Dimensional ◽  
Quantum Plasma ◽  
Plasma System

Solitary waves in an ion-beam-plasma system

1995 ◽  
Vol 53 (2) ◽  
pp. 235-243 ◽  
Author(s):  
Y. Nakamura ◽  
K. Ohtani
Keyword(s):  
Solitary Wave ◽  
Solitary Waves ◽  
Acoustic Waves ◽  
Ion Beam ◽  
Slow Mode ◽  
Plasma System ◽  
Ion Acoustic Wave ◽  
Beam Plasma ◽  
Ion Acoustic ◽  
Beam Mode

Solitary waves in an ion-beam-plasma system are investigated theoretically using the pseudo-potential method, including finite temperatures of plasma ions and beam ions. The beam velocity is high enough to avoid ion-ion instability. Three kinds of solitary waves are possible, corresponding to ion- acoustic waves and to fast and slow space-charge waves in the beam. To observe the formation of solitary waves from an initial positive pulse, numerical simulations are performed. For the slow beam mode, a smaller solitary wave appears at the leading part of the pulse, which is a result of negative nonlinearity and anomalous dispersion of the slow mode, and is the opposite behaviour to the cases of the ion-acoustic wave and to the fast beam mode. Overtaking collisions of a solitary wave with a fast-mode solitary wave or with a slow-mode solitary wave are simulated.

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