Solitary and blow-up electrostatic excitations in rotating magnetized electron-positron-ion plasmas

Moslem, W.M. and Sabry, R. and Abdelsalam, U.M. and Kourakis, I. and Shukla, P.K. (2009) Solitary and blow-up electrostatic excitations in rotating magnetized electron-positron-ion plasmas. New Journal of Physics, 11. 033028. ISSN 1367-2630

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    Abstract

    The nonlinear dynamics of a rotating magnetoplasma consisting of electrons, positrons and stationary positive ions is considered. The basic set of hydrodynamic and Poisson equations are reduced to a Zakharov-Kuznetsov (ZK) equation for the electric potential. The ZK equation is solved by applying an improved modified extended tanh-function method (2008 Phys. Lett. A 372 5691) and its characteristics are investigated. A set of new solutions are derived, including localized solitary waves, periodic nonlinear waveforms and divergent (explosive) pulses. The characteristics of these nonlinear excitations are investigated in detail.