Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pazh...17..377b&link_type=abstract
Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 17, April 1991, p. 377-384. In Russian. In Russian.
Astronomy and Astrophysics
Astronomy
Emission Spectra, Fluorescence, Iron, Metallicity, Solar Flares, Spectral Line Width, Gas Flow, Solar Activity, Turbulence Effects
Scientific paper
The iron-fluorescence mechanism is investigated using a semiempirical model of chromospheric flares. The radiation field of H Ca II + H-epsilon is considered in the present non-LTE calculations for the iron atom model. It is shown that the observed fluorescent strengthening in the range from 4063 to 4132 of Fe I may be obtained if additional broadening of H Ca II + H-epsilon or differential motions in flares is assumed. It is concluded that the most probable cause of the strengthening in the range from 4063 to 4132 of Fe I is the H-epsilon line emission in flare gas moving toward the center of the sun. The velocity gradient of two observed flares is estimated using a 1-point flare model.
Bayazitov Sh. U.
Sakhibullin N. A.
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