First and second-order dust-ion-acoustic rogue waves in non-thermal plasma

A nonlinear Schr\"{o}dinger equation (NLSE) has been derived by employing reductive perturbation method for investigating the modulational instability of dust-ion-acoustic waves (DIAWs) in a four-component plasma having stationary negatively charged dust grains, inertial warm ions, and inertialess non-thermal electrons positrons. It is observed that under consideration, system supports both modulationally stable unstable domains, which are determined sign dispersive coefficients NLSE, DIAWs. also found nonlinearity as well height width first second-order rogue increases with non-thermality electron positron. The relevancy our present investigation to observations space plasmas pinpointed.