Evolution of Dust-Acoustic Solitary Waves in a Dusty Plasma: Effects of Vortex-Like Ion and Nonthermal Electron Distributions

In this paper, a reductive perturbation theory was used to derive a modified korteweg-de-vries equation for dusty plasmas consisting of vortex-like ions and nonisothermal electrons both for the first- and second-order perturbed potential. It was found that the presence of vortex-like ions and nonisothermal electrons modifies the nature of dust-acoustic solitary structures. The results show that the plasma model under consideration permits rarefactive solitons only and the higher-order approximation enhances the amplitude of dust acoustic waves.