Nonlinear ion waves in Fermi-Dirac pair plasmas

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3533425· OSTI ID:21532177

Akbari-Moghanjoughi, M ^[1]

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1. Department of Physics, Faculty of Sciences, Azarbaijan University of Tarbiat Moallem, 51745-406 Tabriz (Iran, Islamic Republic of)

Propagation of arbitrary-amplitude ion-waves is investigated in an extremely degenerate electron-positron-ion plasma with relativistic electrons/positrons and dynamic cold ions using Sagdeev pseudopotential method in the framework of quantum hydrodynamics model. The matching criterion of existence for ion solitary as well as periodic nonlinear excitations is studied numerically in terms of the relativistic degeneracy parameter, relative positron concentration, and the relativistic normalized propagation-speed range of these waves are obtained. It is remarked that the electron relativistic degeneracy and relative positron concentration in such plasmas have significant effects on nonlinear wave propagations in relativistically degenerate Fermi-Dirac plasmas. Our results justify the previously reported ones obtained using semiclassical Thomas-Fermi approximation in dense plasmas with nonrelativistic and ultrarelativistic electrons and positrons. Current findings can be appropriate for the study of astrophysical superdense compact objects such as white dwarfs.

• OSTI ID: 21532177
• Journal Information: Physics of Plasmas, Vol. 18, Issue 1; Other Information: DOI: 10.1063/1.3533425; (c) 2011 American Institute of Physics; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
HYDRODYNAMIC MODEL
ION WAVES
NONLINEAR PROBLEMS
NUMERICAL ANALYSIS
PLASMA DENSITY
RELATIVISTIC RANGE
SOLITONS
THOMAS-FERMI MODEL
WAVE PROPAGATION
ATOMIC MODELS
ENERGY RANGE
MATHEMATICAL MODELS
MATHEMATICS
PARTICLE MODELS
PLASMA WAVES
QUASI PARTICLES
STATISTICAL MODELS
THERMODYNAMIC MODEL