Landau damping of dust acoustic waves in the presence of hybrid nonthermal nonextensive electrons

摘要

Based on the kinetic theory, Landau damping of dust acoustic waves (DAWs) propagating in a dusty plasma composed of hybrid nonthermal nonextensive distributed electrons, Maxwellian distributed ions and negatively charged dust grains is investigated using Vlasov-Poisson's equations. The characteristics of the DAWs Landau damping are discussed. It is found that the wave frequency increases by decreasing (increasing) the value of nonextensive (nonthermal) parameter, q (alpha). It is recognized that alpha plays a significant role in observing damping or growing DAW oscillations. For small values of alpha damping modes have been observed until reaching a certain value of alpha at which omega(i) vanishes, then a growing mode appears in the case of superextensive electrons. However, only damping DAW modes are observed in case of subextensive electrons. The present study is useful in the space situations where such distribution exists.