Physics
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995soph..157..271f&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 157, no. 1-2, p. 271-283
Physics
9
Continuous Spectra, Solar Flares, Solar Physics, Solar Spectra, Spectral Emission, Spectrum Analysis, Sun, Astronomical Models, Chromosphere, Electron Beams, Electron Bombardment, Hydrogen, Photosphere, Solar Temperature
Scientific paper
On October 24, 1991, a white-light flare (WLF) was observed both from space and from the ground. A multi-waveband spectral analysis shows that the peak time of the continuum emission coicides well with that of a radio burst at 2840 MHz and with the hard X-ray emissiomn. Three semi-empiraical models, corresponding to the pre-flare condition and to the peak time of continuum emission both with and without non-thermal excitation and ionization of hydrogen by an electron beam, have been obtained. The results indicate that there is fast heating both in the chromosphere and the photosphere. Some evidence is given that this WLF is very likely a result of bombardment by an electron beam. By taking into account non-thermal effects, the chromo- spheric temperature of the semi-empirical model is significantly reduced.
Fang Chen
Hénoux Jean-Claude
Ju Hu
Qi-Jun Fu
Xiu-Fa Gao
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