Flare loop radiative hydrodynamics. V - Response to thick-target heating. VI - Chromospheric evaporation due to heating by nonthermal electrons. VII - Dynamics of the thick-target heated chromosphere 论文

摘要

The results of thick-target model simulations of the hydrodynamic and radiative response of the solar-loop atmosphere to short bursts of energetic nonthermal electrons are presented in extensive graphs and diagrams and characterized in detail. The physical basis and numerical techniques of the simulations, which continue the program initiated by McClymont and Canfield (1983), are explored; the radiative-loss approximations employed are compared with those of Ricchiazzi (1982); the dynamics of coronal mass motion driven by chromospheric evaporation are investigated; and gentle and explosive evaporation regimes associated with upward and downward velocities in the upper chromosphere, respectively, are differentiated. Consideration is given to the propagation of hydrodynamic waves in heated strongly radiating optically thin plasmas, the formation and propagation of chromospheric condensations, and jump conditions and accretion rates for the compression wave.