Abstract
In the present work, we investigate the propagation and overtaking interaction of electron-acoustic solitary waves (EASWs) in a plasma comprising cold electron fluid, hot nonextensive electrons and immobile ions. For this purpose, the Korteweg–de Vries (KdV) equation is derived for this model. Then Hirota’s direct method is used to the KdV equation to obtain multisoliton solution for studying the interaction process. Our one-dimensional plasma model supports rarefactive EASWs. For both single soliton and multisoliton solutions, the amplitude and velocity of the solitons increase with the increase of nonextensivity or superthermality of hot electrons. It is found that the temporal scale of collision between two solitons decreases with the decrease of nonextensive parameter . The choice of propagation vectors on the interaction of the solitons is also significant. The present analysis may be helpful for further study of the modified bipolar or tripolar electric field signatures observed in the auroral zone.
Published Version
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