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Physics Research International
Volume 2011 (2011), Article ID 103893, 10 pages
http://dx.doi.org/10.1155/2011/103893
Research Article

Nonlinear Gravitoelectrostatic Sheath Fluctuation in Solar Plasma

Department of Physics, Tezpur University, Napaam, Assam, Tezpur 784028, India

Received 4 November 2010; Revised 18 September 2011; Accepted 19 September 2011

Academic Editor: Eric G. Blackman

Copyright © 2011 P. K. Karmakar. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The nonlinear normal mode dynamics is likely to be modified due to nonlinear, dissipative, and dispersive mechanisms in solar plasma system. Here we apply a plasma-based gravitoelectrostatic sheath (GES) model for the steady-state description of the nonlinear normal mode behavior of the gravitoacoustic wave in field-free quasineutral solar plasma. The plasma-boundary wall interaction process is considered in global hydrodynamical homogeneous equilibrium under spherical geometry approximation idealistically. Accordingly, a unique form of KdV-Burger (KdV-B) equation in the lowest-order perturbed GES potential is methodologically obtained by standard perturbation technique. This equation is both analytically and numerically found to yield the GES nonlinear eigenmodes in the form of shock-like structures. The shock amplitudes are determined (~0.01 V) at the solar surface and beyond at 1 AU as well. Analytical and numerical calculations are in good agreement. The obtained results are compared with those of others. Possible results, discussions, and main conclusions relevant to astrophysical context are presented.