The linear dispersion for ion acoustic waves (IAWs) including the effects of dust charge fluctuation and electron nonextensivity is derived. It is shown that the presence of nonextensive electrons modifies the charge fluctuation behavior, leading to the dissipative and instability for IAWs. The dependence of the frequency and damping rate of IAWs on the electron nonextensive parameter q is closely to the dust density since it greatly affects the dust charge fluctuation.
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Chen et al. (2019) studied this question.