Dust ion acoustic solitary structures in presence of nonthermally distributed electrons and positrons

Abstract

The purpose of this paper is to extend the recent work of Paul & Bandyopadhyay [Astrophys. Space Sci. 361, 172(2016)] on the existence of different dust ion acoustic solitary structures in an unmagnetized collisionless dusty plasma consisting of negatively charged static dust grains, adiabatic warm ions, nonthermal electrons and isothermal positrons in a more generalized form by considering nonthermal positrons instead of isothermal positrons. The present system supports both positive and negative potential double layers, coexistence of solitary waves of both polarities and positive potential supersolitons. The qualitative and the quantitative changes in existence domains of different solitary structures which occur for the presence of nonthermal positrons have been presented in comparison with the results of Paul & Bandyopadhyay [Astrophys. Space Sci. 361, 172(2016)]. The formation of supersoliton structures and their limitations have been analyzed with the help of phase portraits of the dynamical system corresponding to the dust ion acoustic solitary structures. Phase portrait analysis clearly indicates a smooth transition between soliton and supersoliton.

arXiv comment27 pages, 10 figures. arXiv admin note: substantial text overlap with arXiv:1605.09464

References in corpus (5)

• The lives and deaths of positrons in the interstellar medium
• The Galactic Positron Annihilation Radiation & The Propagation of Positrons in the Interstellar Medium
• Dust ion acoustic solitary structures in nonthermal dusty plasma
• Dust ion acoustic solitary structures in presence of isothermal positrons
• Dust acoustic wave in a strongly magnetized pair-dust plasma

Cited by in corpus (6)

• First and second-order dust-ion-acoustic rogue waves in non-thermal plasma
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• Dust-acoustic rogue waves in non-thermal plasmas
• Dust ion acoustic solitary structures at the acoustic speed in presence of nonthermal electrons and isothermal positrons
• Dust-Ion-Acoustic Waves in unmagnetized 4-component plasma
• Dynamical generation of macroscale magnetic fields and fast flows in a four-component astrophysical plasma