Propagation of Ion Solitary Pulses in Dense Astrophysical Electron-Positron-Ion Magnetoplasmas

ATA-UR-RAHMAN; S. A. KHAN; A. QAMAR

doi:10.1088/1009-0630/17/12/04

Plasma Science and Technology > 2015 > 17(12): 1000-1005. > DOI: 10.1088/1009-0630/17/12/04

ATA-UR-RAHMAN, S. A. KHAN, A. QAMAR. Propagation of Ion Solitary Pulses in Dense Astrophysical Electron-Positron-Ion Magnetoplasmas[J]. Plasma Science and Technology, 2015, 17(12): 1000-1005. DOI: 10.1088/1009-0630/17/12/04

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Propagation of Ion Solitary Pulses in Dense Astrophysical Electron-Positron-Ion Magnetoplasmas

1Department of Physics, Theoretical Plasma Physics Group, Islamia College Peshawar (A Public Sector University), 25120, Pakistan 2National Centre for Physics, QAU Campus, Shahdrah Valley Road, Islamabad 44000, Pakistan 3Department of Physics, University of Peshawar, Peshawar 25120, Pakistan

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Received Date: December 23, 2014

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Abstract

Abstract

In this paper, we theoretically investigate the existence and propagation of low am?plitude nonlinear ion waves in a dense plasma under the influence of a strong magnetic field. The plasma consists of ultra-relativistic and degenerate electrons and positrons and non-degenerate cold ions. Firstly, the appearance of two distinct linear modes and their evolution is studied by deriving a dispersion equation with the aid of Fourier analysis. Secondly, the dynamics of low amplitude ion solitary structures is investigated via a Korteweg-de Vries equation derived by em?ploying a reductive perturbation method. The effects of various plasma parameters like positron concentration, strength of magnetic field, obliqueness of field, etc., are discussed in detail. At the end, analytical results are supplemented through numerical analysis by using typical representa?tive parameters consistent with degenerate and ultra-relativistic magnetoplasmas of astrophysical regimes.
- KdV equation,
- ion solitary waves,
- dense magnetoplasmas

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References

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