Physics
Scientific paper
Aug 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979azh....56..862g&link_type=abstract
Astronomicheskii Zhurnal, vol. 56, July-Aug. 1979, p. 862-866. In Russian.
Physics
Chromosphere, Dimensional Analysis, Solar Flares, Solar Physics, Electron Energy, Energy Dissipation, Gas Dynamics, Height, Mass, Mathematical Models, Solar Flux Density, Time Dependence
Scientific paper
Results of model calculations of the initial phase of a chromospheric flare are reviewed which were obtained in the framework of the theory of strong gasdynamic explosion with allowance for all substantial dissipative processes. On the basis of these results a method for determining the initial values of density and mass in the explosion region is proposed which yields the observed total energy and the temporal variation of the leading-edge velocity of a chromospheric flare's luminosity. It is found that flare-flash height in the chromosphere increases with increasing initial energy and that an increase in initial mass is accompanied by an increase in the ratio of initial density to the density of the unperturbed chromosphere at the level where a flare occurs. An empirical relation between initial energy and initial mass is established for the electron temperature of the unperturbed chromosphere at the flare-flash height.
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