Browsing by Author "Annou, K."

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    Effects of nonthermal ion distribution and dust temperature on nonlinear dust acoustic solitary waves
    (2007) Annou, K.; Bahamida, Saida; Annou, R.
    An investigation of dust-acoustic solitary waves in unmagnetized dusty plasma whose constituents are inertial charged dust grains, Boltzmannian electrons and nonthermal ions has been conducted taking into account finite dust temperature. The pseudo-potential been used to study solitary solution. The existence of solitary waves of a negative potential is reported
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    Effects of vortex-like electron-positron distribution on solitary waves in plasma
    (2007) Bahamida, Saida; Annou, K.; Annou, R.
    Electron-positron plasmas are believed to exist in the early universe, in active galactic nuclei, and in pulsar magnetospheres. Most of the astrophysical plasmas usually contain ions as well in addition to electrons and positrons. In this work, the ion-acoustic solitons are investigated in three-component plasmas, whose constituents are inertial ions, vortex-like electrons and positron. The properties of stationary structures are studied by pseudo-potential approach, which is valid for large amplitude
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    Electrostatic solitary structures in a nonthermal plasma
    (2007) Annou, K.; Bahamida, Saida; Annou, R.
    An investigation on the effect of dust temperature and dust streaming on dust acoustic solitary waves in unmagnetized dusty plasma, whose constituents are inertial charged dust grains, non-thermal electrons and ions has been conducted. Sagdeev pseudo potential method which takes into account the full nonlinearity of plasma equations is used here to study solitary wave solution
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    Ion-acoustic solitons in electron positron nonthermal plasma
    (2007) Bahamida, Saida; Annou, K.; Annou, R.
    Electron-positron plasmas are believed to exist in the early universe, in active galactic nuclei, and in pulsar magnetospheres. Most of the astrophysical plasmas usually contain ions as well in addition to electrons and positrons. In this work, the ion-acoustic solitons are investigated in three-component plasmas, whose constituents are inertial ions, nonthermal electrons, and Boltzmannian positrons. The properties of stationary structures are studied by pseudopotential approach, which is valid for large amplitude. It is found that the conditions which support the existence of solitons are altered