Nonlinear Langmuir structures: Soliton and shock in a rotating weakly relativistic electron-positron magnetoplasma with stationary positive ions

El-Labany, S. K.; Moslem, W. M.; El-Awady, E. I.
June 2010
Physics of Plasmas;Jun2010, Vol. 17 Issue 6, p062304
Academic Journal
Theoretical and numerical studies are performed for nonlinear Langmuir structures (soliton and shock) in a rotating weakly relativistic electron-positron magnetoplasma with background stationary positive ions. For this purpose, the reductive perturbation technique is employed to the weakly relativistic hydrodynamical electrons/positrons fluid equations and Poisson equation, obtaining extended Zakharov–Kuznetsov equation. The latter has been solved analytically. The features of the nonlinear excitations and their propagation conditions are investigated numerically. Our finding could elucidate the nonlinear electrostatic structures that propagate in astrophysical plasma situations where rotating, magnetized plasma can exist; such as polar cups region of pulsars, around active galactic nuclei, neutron stars, and white dwarfs.


Related Articles

  • Plasma--maser theory for magnetized electron--positron plasma. Kakati, H.; Goswami, K.S. // Physics of Plasmas;Feb97, Vol. 4 Issue 2, p458 

    Presents the plasma maser theory for interaction between nonresonant Bernstein mode and the resonant Langmuir mode in a magnetize electron-positron plasma. Calculation of the growth rate; Cause of the higher growth in an electron-positron plasma.

  • Electrostatic soliton and double layer structures in unmagnetized degenerate pair plasmas. Mahmood, S.; Khan, S. A.; Ur-Rehman, H. // Physics of Plasmas;Nov2010, Vol. 17 Issue 11, p112312 

    The acoustic solitons and double layers are studied in unmagnetized quantum electron-positron plasmas in the presence of stationary ions. The quantum hydrodynamic model is employed and reductive perturbation method is used to derive the Korteweg-de Vries (KdV) and extended KdV equations for...

  • Ion-acoustic solitary waves in ultra-relativistic degenerate pair-ion plasmas. Rasheed, A.; Tsintsadze, N. L.; Murtaza, G. // Physics of Plasmas;Nov2011, Vol. 18 Issue 11, p112701 

    The arbitrary and the small amplitude ion-acoustic solitary waves (IASWs) have been studied. The former is studied by using the Sagdeev pseudo-potential approach in a plasma consisting of the degenerate ultrarelativistic electrons, positrons, and the non-relativistic classical ions. It is seen...

  • Equation of state for magnetized Coulomb plasmas. Potekhin, A. Y.; Chabrier, G. // Astronomy & Astrophysics / Astronomie et Astrophysique;Feb2013, Vol. 550, p1 

    We have developed an analytical equation of state (EOS) for magnetized fully-ionized plasmas that cover a wide range of temperatures and densities, from low-density classical plasmas to relativistic, quantum plasma conditions. This EOS directly applies to calculations of structure and evolution...

  • Spiky Langmuir solitons in a dense ultrarelativistic electron–positron plasma. Mofiz, U. A.; Mamun, A. A. // Physics of Fluids B: Plasma Physics;Nov92, Vol. 4 Issue 11, p3806 

    Spiky and short-duration Langmuir solitons are found to exist in an ultrarelativistic electron–positron plasma. Nonlinear Landau damping and pulsar radiation are discussed.

  • Head-on collision of ion-acoustic solitary waves in an unmagnetized electron-positron-ion plasma. Han, J. N.; Li, S. C.; Yang, X. X.; Duan, W. S. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Aug2008, Vol. 47 Issue 2, p197 

    The head-on collision between two ion-acoustic solitary waves in an unmagnetized electron-positron-ion plasma has been investigated. By using the extended Poincaré-Lighthill-Kuo perturbation method, we obtain the KdV equation and the analytical phase shift after the head-on collision of two...

  • The Characteristics of Ion-Acoustic Solitons in Electron-Positron-Ion Magnetized Plasma. Eslami, P.; Mottaghizadeh, M. // International Review of Physics;Jun2009, Vol. 3 Issue 3, p150 

    In this paper, the propagation of ion-acoustic waves in electron-positron-ion magnetized plasmas is analyzed, numerically. The effect of positron density on the amplitude of ion-acoustic waves is also studied. Corresponding to a fixed positron density, it is shown that the speed of the wave can...

  • Nonlinear perpendicular propagation of ordinary mode electromagnetic wave packets in pair plasmas and electron-positron-ion plasmas. Kourakis, I.; Verheest, F.; Cramer, N. F. // Physics of Plasmas;Feb2007, Vol. 14 Issue 2, p022506 

    The nonlinear amplitude modulation of electromagnetic waves propagating in pair plasmas, e.g., electron-positron or fullerene pair-ion plasmas, as well as three-component pair plasmas, e.g., electron-positron-ion plasmas or doped (dusty) fullerene pair-ion plasmas, assuming wave propagation in a...

  • Solitons and shocks in dense astrophysical magnetoplasmas with relativistic degenerate electrons and positrons. Ali, S.; Ata-ur-Rahman // Physics of Plasmas;Apr2014, Vol. 21 Issue 4, p1 

    The linear and nonlinear properties of the ion-acoustic (IA) waves are investigated in a relativistically degenerate magnetoplasma, whose constituents are the electrons, positrons, and ions. The electrons and positrons are assumed to obey the Fermi-Dirac statistics, whereas the cold ions are...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics