Hydromagnetic Waves in a Compressed Dipole Field via Field-Aligned Klein-Gordon Equations

  title={Hydromagnetic Waves in a Compressed Dipole Field via Field-Aligned Klein-Gordon Equations},
  author={Jinlei Zheng and Qiang Hu and James F. Mckenzie and Gary M. Webb},
  journal={arXiv: Space Physics},
Hydromagnetic waves, especially those of frequencies in the range of a few milli-Hz to a few Hz observed in the Earth's magnetosphere, are categorized as Ultra Low Frequency (ULF) waves or pulsations. They have been extensively studied due to their importance in the interaction with radiation belt particles and in probing the structures of the magnetosphere. We developed an approach in examining the toroidal standing Aflv\'{e}n waves in a background magnetic field by recasting the wave equation… 

Hybrid fluid‐particle simulation of whistler‐mode waves in a compressed dipole magnetic field: Implications for dayside high‐latitude chorus

In this work we present a methodology for simulating whistler‐mode waves self‐consistently generated by electron temperature anisotropy in the inner magnetosphere. We present simulation results using



Toroidal hydromagnetic waves in an axi-symmetric magnetic field

[1] Hydromagnetic wave equations are derived for toroidal Alfven waves in a background, axi-symmetric magnetic field. In the case, where the spatial variations in the wave equations are along the

Klein-Gordon equations for toroidal hydromagnetic waves in an axi-symmetric field

Abstract. In this paper we develop the hydromagnetic wave equations for toroidal Alfven waves in a background axi-symmetric magnetic field. In the case where spatial variations are directed along the

Alfven wave resonances in a realistic magnetospheric magnetic field geometry

The notion of magnetic field line resonance has been very effective in explaining many features of long-period geomagnetic pulsations. To date the decoupled transverse wave equations have been solved

Modeling ULF waves in a compressed dipole magnetic field

[1] This paper presents the results of a linear model for global scale magneto-hydrodynamic (MHD) waves in a compressed dipole model magnetosphere. We examine scenarios where a localized

Klein-Gordon equations for horizontal transverse oscillations in two-dimensional coronal loops

We present a theory for hydromagnetic waves in an axi-symmetric background magnetic field in which the wave equations for the horizontal transverse magnetic field and velocity perturbations can be

Polarization properties of standing shear Alfvén waves in non-axisymmetric background magnetic fields

In this paper we present results concerning periods and polarizations of cold plasma ultra-low frequency (ULF) guided Alfven waves in a non-axisymmetric geomagnetic field. The background geomagnetic

Impact of toroidal ULF waves on the outer radiation belt electrons

[1] Relativistic electron fluxes in the outer radiation belt exhibit highly variable complex behavior. Previous studies have established a strong correlation of electron fluxes and the inner

Standing Alfvén waves in the magnetosphere

Transverse, low-frequency oscillations in the magnetic field have been recorded in the equatorial plane at 6.6 RE (earth radii) with the UCLA magnetometer on board ATS 1. The oscillations have

Toroidal wave frequency at L = 6–10: Active Magnetospheric Particle Tracer Explorers/CCE observations and comparison with theoretical model

[1] Magnetospheric standing Alfven waves are guided along the ambient magnetic field, and their frequency depends on the mass density of the plasma distributed along the field lines. These properties

Excitation of poloidal standing Alfvén waves through drift resonance wave‐particle interaction

Drift‐resonance wave‐particle interaction is a fundamental collisionless plasma process studied extensively in theory. Using cross‐spectral analysis of electric field, magnetic field, and ion flux