Dust-acoustic waves in a self-gravitating complex plasma with trapped electrons and nonisothermal ions
Department of Mathematics, Siksha Bhavana, Visva-Bharati, Santiniketan 731 235, India
2 High Energy Physics Division, Department of Physics, Jadavpur University, Kolkata 700 032, India
Revised: 19 May 2005
Published online: 23 August 2005
It is shown that the nonlinear equations governing the dynamics of the large amplitude waves in a self-gravitating unmagnetized collisionless dust-electron-ion plasma admit stationary dust-acoustic shock solutions. Owing to the adiabaticity of dust-charge variation, inclusion of self-gravitation, and to the departure from the so-called Botzmannian electrons and ions to the trapped electrons and nonthermal ions, the dynamics of the nonlinear wave is found to be governed by a new energy-like integral equation.
PACS: 52.35.Sb – Solitons; BGK modes / 52.30.Ex – Two-fluid and multi-fluid plasmas / 52.35.-g – Waves, oscillations, and instabilities in plasmas and intense beams / 52.35.Mw – Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005