Abstract
Small amplitude dust-acoustic solitary waves in an unmagnetized dusty plasma consisting of electrons and two temperature ions obeying the q-nonextensive distribution are investigated. Employing reductive perturbation method, the Korteweg-de Vries (KdV) equation is derived. From the solitonic solutions of KdV equation, the influence of nonextensivity of electrons as well as ions and dust concentration on the amplitude and width of dust-acoustic solitary waves has been studied. It is observed that both positive and negative potential dust acoustic solitary waves occur in this case. The modified KdV (mKdV) equation is derived in order to examine the solitonic solutions for the critical plasma parameters for which KdV theory fails. The parametric regimes for the existence of mKdV solitons and double layers (DLs) have also been determined. Positive potential double layers are found to occur in the present study.
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This work was supported by University Grants Commission, New Delhi, India under the major research project F. No. 41-873/2012(SR).
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Saini, N.S., Kohli, R. Dust-acoustic solitary waves and double layers with two temperature ions in a nonextensive dusty plasma. Astrophys Space Sci 348, 483–494 (2013). https://doi.org/10.1007/s10509-013-1578-z
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DOI: https://doi.org/10.1007/s10509-013-1578-z