Fast wave evanescence in the solar corona

Details Fast wave evanescence in the solar corona Fast wave evanescence in the solar corona

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978georl...5..731h&link_type=abstract

Geophysical Research Letters, vol. 5, Aug. 1978, p. 731-734.

Computer Science

Sound

15

Evanescence, Magnetohydrodynamic Waves, Propagation Modes, Solar Corona, Solar Wind, Wave Propagation, Atmospheric Stratification, Convection, Magnetic Field Configurations, Plasma Heating, Sound Waves

Scientific paper

In studies of fast mode MHD waves in heating and accelerating the solar wind, it is always assumed that the fast mode waves originate at the sun as a consequence of motions in the solar convection zone. This paper examines whether the sun can actually produce a significant flux of fast waves. Using a horizontally stratified model of the solar atmosphere, it is shown that known solar motions could lead almost exclusively to fast waves which are evanescent, and therefore that fast waves of solar origin may not represent a significant extended source of energy and momentum in the solar wind.

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