Dust acoustic solitons in a charge varying dusty plasma in the presence of ion nonthermality and background nonextensivity

作者：Benzekka Moufida^*; Tribeche Mouloud

来源：Physics of Plasmas, 2013, 20(8): 083702.

DOI：10.1063/1.4817748

Dust acoustic (DA) solitons are addressed in a charge varying dusty plasma in the presence of ion nonthermality and background nonextensivity. A physically meaningful nonthermal nonextensive ion distribution is outlined. The correct non-Maxwellian ion charging current is derived based on the orbit-limited motion theory. Under grain-current balance, the variable dust charge is expressed in terms of the Lambert function. It is found that nonthermality and its nonextensive nature may act concurrently and influence the restoring force and hence the soliton profile. Due to the flexibility provided by the nonextensive parameter, we think that our model should provide a better fit of the space observations.

• 出版日期2013-8