Computer Science – Numerical Analysis
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...429..890d&link_type=abstract
The Astrophysical Journal, vol. 429, no. 2, pt. 1, p. 890-898
Computer Science
Numerical Analysis
17
Atmospheric Models, Calcium, Continuous Spectra, H Alpha Line, Line Spectra, Photosphere, Solar Flares, Transportation Energy, Visible Spectrum, Computer Programs, Coronagraphs, Data Reduction, Local Thermodynamic Equilibrium, Numerical Analysis, Temporal Resolution
Scientific paper
We derive a semi-empirical atmospheric model for the 1979 September 19 white-light flare (WLF), based on the observed continuum at 3590 to 3990 A and the Ca II K line profile. The model has a strongly heated photosphere, but has a chromospheric structure within the range of ordinary flare models. According to this model, the white-light continuum is mainly produced by the H- emission in the photosphere. A negative Balmer jump appears in the continuum spectrum (without considering the line blanketing effect), due to the Balmer continuum absorption in the chromosphere. From the spectral features and model results, the traditional heating mechanisms that are proposed to transport the energy from the corona down to deep layers seem insufficient to fully explain the photospheric heating for this WLF. The heating energy may originate within the photosphere itself. The possible energy release processes are also discussed, but a satisfactory explanation needs further quantitative studies.
Ding Ming-De Ding
Fang Chen
Gan Wei-Qun
Okamoto Tohru
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