Physics
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993soph..143..259z&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 143, no. 2, p. 259-274.
Physics
31
Electron Beams, H Lines, Solar Atmosphere, Solar Electrons, Solar Flares, Solar Spectra, Chromosphere, Excitation, Ionization
Scientific paper
The electron beam effect on the hydrogen line profiles and continuum intensity distribution during the impulsive phase of flares is quantitatively investigated. The flaring atmosphere is assumed to be hydrogenic, and its physical condition agrees with the gas dynamics problem solution. For the three-level hydrogen model atoms with continua, radiative transfer, steady-state, and particle conservation equations are solved. Hydrogen line profiles are determined to be more sensitive to nonthermal impacts with beam electrons in the wings than in the cores. Wing intensities begin to increase as the initial energy flux rises and energy spectral index decreases, and the H alpha lines are shown to have rather extended wings, corresponding with observations. Nonthermal impacts strongly affect the hydrogen continua. Greater absolute intensities of the hydrogen continua heads result from larger values of initial energy flux and smaller values of energy spectral index.
Kobylinskii V. A.
Zharkova Valentin
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