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Arbitrary amplitude dust–ion acoustic solitary structures in electronegative plasma

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Abstract

In the present study existence domains of large amplitude dust–ion acoustic (DIA) solitary structures are analyzed in an unmagnetized and collisionless, electronegative plasma containing inertial positive and negative ions, inertialess superthermal electrons with two different temperatures and negatively charged stationary dust. Using the Sagdeev pseudopotential technique, the energy-balance equation has been derived and the critical values (lower and upper limits) of the Mach number are also determined. The effect of different physical parameters has been analyzed for the formation of these nonlinear structures. Also the critical values of different physical parameters have been determined to establish parametric regimes for the existence of positive/negative potential DIA solitary structures.

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Acknowledgements

This work is supported by DRS-II (SAP) No. F530/17/DRS-II/2015 (SAP-I) UGC, New Delhi. The corresponding author may provide the numerical data which was used to produce tables and figures in the present investigation.

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Correspondence to N. S. Saini.

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Kohli, R., Saini, N.S. & Gill, T.S. Arbitrary amplitude dust–ion acoustic solitary structures in electronegative plasma. Astrophys Space Sci 363, 193 (2018). https://doi.org/10.1007/s10509-018-3414-y

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  • DOI: https://doi.org/10.1007/s10509-018-3414-y

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