Please use this identifier to cite or link to this item: http://library.iigm.res.in:8080/xmlui/handle/123456789/169
Title: Dromion solutions for nonlinear electron acoustic waves in space plasmas
Authors: Ghosh, S.S.
Sen, A.
Lakhina, G.S.
Keywords: POLAR
Space plasma
Nonlinear electron acoustic waves
Dromion solutions
Issue Date: 2002
Citation: Nonlinear Processes in Geophys.,v.9, p.463-475, 2002, doi: 10.5194/npg-9-463-2002
Abstract: Recent high resolution measurements of POLAR and FAST satellites have revealed two-dimensional coherent structures in the polar cap boundary layer (PCBL) region. Since the ion temperature is often observed to be greater than the electron temperature in this region, electron acoustic waves can exist as a normal mode of the plasma system. It is shown that the nonlinear evolution of such waves can be modelled by the coupled Davey-Stewartson I equations. These equations, which are a generalization of the nonlinear Schrodinger equation to two dimensions, admit exponentially localized solutions called dromions. A detailed parametric characterization of the regions of existence of such solutions is presented in the context of the PCBL region.
URI: http://localhost:8080/xmlui/handle/123456789/169
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