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Effect of ion temperature on dust ion acoustic solitary waves in a warm unmagnetized plasma with electron inertia

Abstract

The existence of Korteweg-de Vries (KdV) solitons has been established in an unmagnetized warm dusty plasma consisting of positive ion, electrons and static negatively charged dust particles. Depending upon e i T T   (= ion to electron temperature), only fast compressive and rarefactive ion-acoustic solitons are found to exist. The amplitude of the rarefactive fast ion acoustic solitons exists only for smaller values of 1 1 0 0 0             i d d io e n Z n n n  ( d Z is the number of elementary charges residing on the dust grain) and its amplitude increases as   1 increases. Furthermore, they are found to exist only in the lower regime of   1 . On the other hand, compressive fast ion acoustic solitons exist only in the upper regime of   1 .

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