Nonlinear oblique propagation of magnetohydrodynamic waves in the solar wind

Details Nonlinear oblique propagation of magnetohydrodynamic waves in the solar wind Nonlinear oblique propagation of magnetohydrodynamic waves in the solar wind

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ncimc..15..631m&link_type=abstract

Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol. 15 C, no. 5, p. 631-644.

Physics

Bow Waves, Cometary Atmospheres, Magnetohydrodynamic Waves, Oblique Shock Waves, Solar Wind, Wave Propagation, Digital Simulation, Polarization (Waves)

Scientific paper

The nonlinear evolution of an elliptically polarized MHD wave in oblique propagation is studied, both in one-dimensional configurations and with a weak transverse modulation superimposed. Both analytical and numerical techniques are employed. In the two-dimensional evolution, two main mechanisms that play a role in the wave evolution are identified: a transverse instability, resulting from the transverse modulation of the steepening velocity induced by the initial perturbation, and a self-focusing effect, which is a consequence of variations of the total pressure in the transverse direction. The theoretical predictions made here are in good agreement with the features observed in solar-wind waves.

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