On the spectral characteristics and atmospheric models of two types of white-light flares.

Details On the spectral characteristics and atmospheric models of two types of white-light flares. On the spectral characteristics and atmospheric models of two types of white-light flares.

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26as..110...99f&link_type=abstract

Astronomy and Astrophysics Supplement, v.110, p.99

Astronomy and Astrophysics

Astrophysics

27

Sun: Flares, Radio Radiation, X-Rays

Scientific paper

Based on detailed analyses of the solar white-light flares (WLFs) of 1974 September 10, 1979 September 19 and 1991 October 24, the characteristics of two types of WLFs have been distinguished. For the Type I WLF, there is a good time correlation between the maximum of continuum emission and the peaks of hard X-rays and microwave radiations; there is also a strong Balmer jump in the spectra; the Balmer lines are strong and very broad. For the Type II WLF, the situations are quite different. For these two types of WLFs, the atmospheric models and the contributions to the continuum from the hydrogen atoms and negative hydrogen ions, as well as the net radiative cooling rates, have been compared in detail. The possible mechanisms for the two types of WLFs have also been discussed.

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