Nonplanar dust acoustic solitary waves in a strongly coupled dusty plasma with superthermal ions

The nonplanar amplitude modulation of dust acoustic (DA) envelope solitary waves in a 
strongly coupled dusty plasma (SCDP) has been investigated. By using a reductive 
perturbation technique, a modified nonlinear Schrödinger equation (NLSE) including the 
effects of geometry, polarization, and ion superthermality is derived. The modulational 
instability (MI) of the nonlinear DA wave envelopes is investigated in both planar and 
nonplanar geometries. There are two stable regions for the DA wave propagation strongly