Chromospheric and coronal heating by sound waves

Details Chromospheric and coronal heating by sound waves Chromospheric and coronal heating by sound waves

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...226.1135a&link_type=abstract

Astrophysical Journal, Part 1, vol. 226, Dec. 15, 1978, p. 1135-1139.

Computer Science

Sound

109

Atmospheric Heating, Chromosphere, Radiative Transfer, Solar Atmosphere, Solar Corona, Sound Waves, H Alpha Line, Lyman Spectra, Magnetohydrodynamic Waves, Saha Equations, Solar Spectra

Scientific paper

An upper limit to the energy flux in sound waves in the chromosphere is obtained from observational data, and the required heat input to the chromosphere is examined. The height dependence of both the energy flux in sound waves and the required heat input is analyzed. It is found that the heat input has two maxima and that the flux in sound waves is too low to produce the second maximum. It is concluded that the low chromosphere may be heated by sound waves but that a different mechanism heats the upper chromosphere, transition region, and corona. The possibility is considered that the microturbulence derived from line broadening is produced by Alfven waves rather than sound waves.

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