Instability of nonplanar modulated dust acoustic wave packets in a strongly coupled nonthermal dusty plasma

Cylindrical and spherical amplitude modulations of dust acoustic (DA) solitary wave 
envelopes in a strongly coupled dusty plasma containing nonthermal distributed ions are 
studied. Employing a reductive perturbation technique, a modified nonlinear Schrödinger 
equation including the geometrical effect is derived. The influences of nonthermal ions, 
polarization force, and the geometries on the modulational instability conditions are 
analyzed and the possible rogue wave structures are discussed in detail. It is found that