Vahid Fallahi

Propagation of dust ion-acoustic (DIA) Gardner wave in a dusty electron–positron–ion (e–p–i) plasma is investigated. This plasma consists of q-distributed electrons and positrons, warm ions, and dust grains. The effects of the electron nonextensivity, positron nonextensivity, and fractional parameter on the properties of DIA Gardner wave are investigated. Space fractional Gardner (SFG) equation is derived using the semi inverse technique. An efficient modified G′/G-expansion method is presented to solve the SFG equation. It is found that the amplitude of the DIA Gardner wave increases with an increase in space fractional parameter (β) and spatial parameter (ζ). On other hands, the DIA Gardner wave shape can be modulated using the space fractional parameter (β). Our results may help understand the astrophysical environments such as star magnetospheres, solar flares, and galactic nuclei.