Abstract
The properties of small but finite amplitude dust acoustic (DA) shock waves are studied in a charge varying dusty plasma with ions and electrons having kappa velocity distribution. We obtain the global Debye length including the influence of suprathermality effects and dust charge fluctuations. It is shown that the effects of suprathermality of ions/electrons and dust charge fluctuation significantly modify the basic properties of DA shock wave. We observe that only negative DA shock waves will be excited in this model. The amplitude of DA shock wave increases with deviation of electrons or ions from Maxwellian distribution via decrease of spectral index, κ j (j=i,e denotes, ions and electrons, respectively). Also, it is indicated that the amplitude and steepness of the shock front decreases with an increase in the ion temperature.
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Acknowledgements
This work has been supported financially in part by Research Institute for Astronomy and Astrophysics of Maragha (RIAAM) under research project No. 1/2354. The excellent expert comments of the referee are gratefully acknowledged.
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Shahmansouri, M., Alinejad, H. Dust acoustic shock waves in a suprathermal dusty plasma with dust charge fluctuation. Astrophys Space Sci 343, 257–263 (2013). https://doi.org/10.1007/s10509-012-1216-1
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DOI: https://doi.org/10.1007/s10509-012-1216-1