Effect of superthermal electrons on dust-acoustic Gardner solitons in nonplanar geometry |
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| Authors: | Deb Kumar Ghosh Uday Narayan Ghosh Prasanta Chatterjee C S Wong |
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| Institution: | 1. Department of Mathematics, Siksha Bhavana, Visva Bharati University, Santiniketan, 731 235, India
2. Department of Physics, Plasma Research Laboratory, University of Malaya, 50603, Kuala Lumpur, Malaysia
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| Abstract: | The properties of nonplanar (cylindrical and spherical) dust-acoustic solitary waves (DASWs) in an unmagnetized, collisionless three-component dusty plasma, whose constituents are negatively charged cold dust fluid, superthermal/non-Maxwellian electrons (represented by kappa distribution) and Boltzmann distributed ions, are investigated by deriving the modified Gardner (MG) equation. The well-known reductive perturbation method is employed to derive the MG equation. The basic features of nonplanar DA Gardner solitons (GSs) are discussed. It is seen that the properties of nonplanar DAGSs (positive and negative) significantly differ as the value of spectral index κ changes. |
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