Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...256..255f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 256, no. 1, p. 255-263.
Astronomy and Astrophysics
Astrophysics
20
Chromosphere, H Alpha Line, Solar Flares, Spectral Signatures, Velocity Distribution, Visible Spectrum, Absorption Spectra, Spectrum Analysis
Scientific paper
Observations are described of the June 13, 1980 flare, made simultaneously at NSO Sacramento Peak Observatory and with the Universal Birefringent Filter in parallel with an H-alpha filter. The velocities obtained from chromospheric lines in the flare area are compared with the velocities predicted by numerical simulations of gas dynamics in flare loops (Fisher, 1986, 1989). The results show that the chromospheric condensation, predicted to be moving downwards with constant velocity within the condensation, is likely to have a velocity gradient and that the layers ahead of it might be affected by the motion of the condensation.
Falchi Ambretta
Falciani Roberto
Smaldone L. A.
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