Nonlinear Alfven wave modulation in the solar atmosphere

Details Nonlinear Alfven wave modulation in the solar atmosphere Nonlinear Alfven wave modulation in the solar atmosphere

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..123..117s&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 123, no. 1, 1989, p. 117-125.

Physics

2

Magnetohydrodynamic Waves, Modulation, Plasma Diagnostics, Solar Atmosphere, Wave Propagation, Electrostatic Waves, Ion Cyclotron Radiation, Magnetic Field Configurations, Perturbation Theory, Schroedinger Equation, Solar Planetary Interactions

Scientific paper

Nonlinear interaction of finite-amplitude Alfven waves with nonresonant finite-frequency electrostatic and stationary electromagnetic perturbations is considered. This interaction is governed by a pair of coupled equations consisting of nonlinear Schroedinger equation for the Alfven wave envelope and an equation for the plasma slow response that is driven by the ponderomotive force of the Alfven wave packets. The modulational instability of a constant amplitude Alfven pump is investigated, and some new results for the growth rate of the instability are presented. It is found that a possible stationary state of the modulated Alfven wave packets could lead to localized structures. The relevance of the investigation to the solar atmosphere is discussed.

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