Non-WKB Alfven waves in the solar wind

Details Non-WKB Alfven waves in the solar wind Non-WKB Alfven waves in the solar wind

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.1311h&link_type=abstract

Journal of Geophysical Research, vol. 85, Mar. 1, 1980, p. 1311-1327.

Physics

77

Magnetohydrodynamic Waves, Solar Wind, Wave Propagation, Wentzel-Kramer-Brillouin Method, Axisymmetric Flow, Flux Density, Fourier Analysis, Solar Rotation, Toroidal Plasmas, Wave Equations, Wavelengths

Scientific paper

Non-WKB, small-amplitude, undamped toroidal Alfven waves are considered in a model of axisymmetric solar wind flow in which solar rotation is neglected. The solar wind problem is discussed in terms of the Fourier amplitudes, and a singularity is shown in the equations at the Alfven point which determines physically acceptable solar wind solutions. In addition, modest enhancement of the wave energy density compared to the WKB estimate is found to occur when the wavelength is comparable to the scale length of the medium, due to reflections from gradients in the medium; inward propagating waves contribute to this enhanced wave energy density.

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