Comment on 'Role of dispersive Alfvén waves in generating parallel electric fields

Comment on ‘ ‘ Role of dispersive Alfvén waves in generating parallel electric fields along the Io - Jupiter fluxtube ’ ’ by S .

Comment on ‘‘Role of dispersive Alfvén waves in generating parallel electric fields along the Io-Jupiter fluxtube’’ by S. T. Jones

[1] The authors of a recent paper [Jones and Su, 2008] have used two-fluid plasma theory [e.g., Streltsov et al., 1998] to predict the parallel electric field strength of a shear Alfvén wave traveling through the Jovian magnetosphere from the vicinity of Io to the Jovian ionosphere. [2] Two-fluid analyses give adequate predictions for the parallel electric field strength Ek in plasma regimes wh...

Propagation of kinetic Alfvén waves in the ionospheric Alfvén resonator in the presence of density cavities

[1] Recent observations of particle distributions that are narrow in pitch angle and broad in energy have suggested that kinetic Alfvén waves are a significant contributor to auroral particle acceleration. Oscillations at frequencies near 1 Hz are a natural consequence of the propagation of Alfvén waves in the strongly varying Alfvén speed profile above the auroral ionosphere, the so-called ion...

Localized parallel electric fields associated with inertial Alfvén waves

Measurements of intense, localized parallel electric fields are reported in association with inertial Alfvén waves and accelerated electron fluxes in a space plasma. The parallel electric fields are localized to several hundreds of Debye lengths and carry potentials on the order of the energy of the accelerated electron fluxes. The structures are observed at sharp maxima or minima of the pertur...

Solar coronal electron heating by short-wavelength dispersive shear Alfvén waves

The electron heating of the solar coronal plasma has remained one of the most important problems in solar physics. An explanation of the electron heating rests on the identification of the energy source and appropriate physical mechanisms via which the energy can be channelled to the electrons. Our objective here is to present an estimate for the electron heating rate in the presence of finite ...