Swing coupling of sound and Alfvén waves

Details Swing coupling of sound and Alfvén waves Swing coupling of sound and Alfvén waves

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506...79z&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

4

Plasma, Mhd Waves, Mode Coupling

Scientific paper

The weakly nonlinear interaction of sound and linearly polarized Alfvén waves propagating along an applied magnetic field is studied in the case when the sound and Alfvén speeds are equal. The sound wave is coupled to an Alfvén wave with double period and wavelength. The Alfvén wave drives the sound wave due to the ponderomotive force, while the sound wave returns the energy back to the Alfvén wave through the swing wave-wave interaction (Zaqarashvili, 2001). As a result, the waves alternately exchange their energy during the propagation. The process of energy exchange is faster for waves with stronger amplitudes. The phenomenon can be of importance in the solar atmosphere, solar wind and other astrophysical situations.

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