Abstract
In this paper, (2+1)-dimensional electron acoustic waves (EAW) inan unmagnetized collisionless plasma have been studied by thelinearized method and the reductive perturbation technique,respectively. The dispersion relation and a modifiedKadomtsev–Petviashvili (KP) equation have been obtained for theEAW in the plasma considering a cold electron fluid and avortex-like hot electrons. It is found from some numerical resultsthat the parameter β (the ratio of the free hot electrontemperature to the hot trapped electron temperature) effects on theamplitude and the width of the electron acoustic solitary waves(EASW). It can be indicated that the free hot electron temperatureand the hot trapped electron temperature have very importanteffect on the characters of the propagation for the EASW.
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