Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238.1134g&link_type=abstract
Astrophysical Journal, Part 1, vol. 238, June 15, 1980, p. 1134-1151. Research supported by the Lockheed Independent Research F
Astronomy and Astrophysics
Astrophysics
28
Atmospheric Models, Chromosphere, Solar Atmosphere, Solar Spectra, Optical Thickness, Radiative Transfer, Solar Oscillations, Time Dependence
Scientific paper
Two of the most representative chromospheric lines, Mg II k and Ca II K are used to study the formation of optically thick lines in a time-dependent, one-dimensional model of the solar atmosphere. Time sequences of these line profiles are calculated for two kinds of atmospheric motions: propagation of a pulse through the atmosphere, and free oscillations. The mechanisms of formation (especially the displacement of the emitting layers) are studied for different parts of the profiles. Finally, the deformations of the profiles are analyzed using methods also suitable for observations, and the resulting parameters are compared to physical variables in order to evaluate the diagnostic methods.
Gouttebroze Pierre
Leibacher John W.
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