Computer Science – Sound
Scientific paper
Oct 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...44..299g&link_type=abstract
Solar Physics, vol. 44, Oct. 1975, p. 299-314.
Computer Science
Sound
26
Chromosphere, Magnetohydrodynamic Waves, Solar Granulation, Solar Radiation, Sound Waves, Atmospheric Heating, H Alpha Line, Solar Atmosphere, Solar Corona, Standing Waves, Traveling Waves
Scientific paper
Observations of two, possibly three, wave systems in H-alpha films of the chromosphere are reported. These systems include waves propagating outwards along mottles, fibrils, and superpenumbral fibrils radiating from a small sunspot; vertical velocity fluctuations in the chromospheric granulation; and a horizontal drift of the granulation pattern. It is found that the first system is a system of Alfven waves, the second has the characteristics of standing acoustic waves, and the third may be due to horizontal acoustic waves or horizontal gas streaming. It is shown that the Alfven waves make a significant contribution to coronal heating and that the vertical oscillations could provide a source of coronal heating of similar magnitude to the Alfven waves if they are upward-traveling acoustic waves.
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