Advances in Astrophysics

Download PDF (546.1 KB) PP. 161 - 172 Pub. Date: November 1, 2016

DOI: 10.22606/adap.2016.13003

• Obaydur Rahman^*
  Department of Physics, Mawlana Bhashani Science and Technology University, Santosh, Tangail, Bangladesh
• Md. Masum Haider
  Department of Physics, Mawlana Bhashani Science and Technology University, Santosh, Tangail, Bangladesh

The effects of vortex-like (trapped) negative ion, Maxwellians electron, arbitrarily charged stationary dust, and cold mobile inertial positive ion have been theoretically investigated in the study of nonlinear propagation of dust-ion-acoustic (DIA) solitary waves (SWs) in an unmagnetized dusty electronegative plasma (DENP). The properties of small but finite amplitude DIASWs are studied by employing the reductive perturbation technique (RPT). It has been found that owing to the departure from the Maxwellian negative ion distribution to a vortex-like one, the dynamics of such DIASWs is governed by a modified Korteweg-de Vries (mK-dV) equation which admits solitary wave solution under certain conditions. The basic properties (speed, amplitude, width, etc.) of such DIASWs are found to be significantly modified by the effects of trapped negative ions and arbitrarily charged stationary dust particles. The results should be useful for understanding the nonlinear propagation of DIASWs in laboratory and space plasmas (e.g., Earth’s magnetosphere, auroral region, heliospheric environments etc.).

Dust-ion-acoustic waves, solitary waves, electronegative dusty plasma, trapped negative ions.

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