The nonlinear dust-acoustic solitary waves in dust plasma with two-temperature nonthermal ions

The effect of two-temperature nonthermal ions on small, but flnite, amplitude nonlinear dust- acoustic waves (DAW) is studied in a dusty plasma consisting of a negative dust °fluid, Boltzmann distributed electrons, and two-temperature nonthermally distributed ions. We derive a Korteweg-de Vries (KdV) equation governing the dust-acoustic solitary waves by using the reductive perturbation method. We show that the presence of two-temperature nonthermal ions modi¯es the properties of dust-acoustic solitary structures significantly and may allow rarefactive and compressive solitary waves to coexist. KCI Citation Count: 18