Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....97..310m&link_type=abstract
Astronomy and Astrophysics, vol. 97, no. 2, Apr. 1981, p. 310-316.
Astronomy and Astrophysics
Astrophysics
38
Chromosphere, Energy Dissipation, Photosphere, Solar Flux, Solar Oscillations, Atmospheric Models, Error Analysis, Line Spectra, Solar Corona, Vertical Distribution
Scientific paper
The mechanical flux in the photosphere and the chromosphere is inferred from observations of atmospheric oscillations made over a large range of periods (60s-400s). Observations of Doppler shifts in Ca II and Mg I lines are related to velocities by means of heights of formation and modulation transfer functions deduced from weighting functions. The flux is derived from estimates of the amplitude and phase of the velocity at different heights in the atmosphere. The results imply that the energy dissipated by waves in a plane-parallel atmospheric model is insufficient to balance the radiative losses. The short-fall can reach a factor 100 in the high chromosphere. Heating of the corona by shock wave dissipation is inconsistent with our results.
Mein Nicole
Schmieder Brigitte
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