Statistics – Computation
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.2206a&link_type=abstract
American Astronomical Society, 194th AAS Meeting, #22.06; Bulletin of the American Astronomical Society, Vol. 31, p.860
Statistics
Computation
Scientific paper
The results from a non-LTE radiative-hydrodynamic model of a flare loop, from its apex in the corona to its footpoints in the photosphere, are presented. The effects of non-thermal heating of the lower solar atmosphere by accelerated electrons during the impulsive phase, and the subsequent effects of soft X-ray irradiation of the chromosphere from the flare-heated transition region and corona during the beginning of the gradual phase are investigated. During the impulsive phase, the models show a significant continuum (or ``white light'') brightening resulting from increased hydrogen recombination radiation in the upper chromosphere at the point where the accelerated electrons deposit the bulk of their energy. Additionally, the models produce a measurable time lag between the brightening of the near wings of H-alpha and the brightening of the Paschen continuum. This work was funded in part by NSF grants AST 96-16886 and AST 94-57455. The computations were partially supported by the National Computational Science Alliance, and utilized the NCSA SGI/CRAY Power Challenge Array.
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