A hydrodynamic model of the impulsive phase of a solar flare loop

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Coronal Loops, Hydrodynamic Equations, Radiative Transfer, Solar Flares, Chromosphere, Solar X-Rays, Stellar Models

Scientific paper

With improvements in modeling of the chromospheric radiative loss and in the resolution of the transition region, together with the introduction of the mechanism of chromospheric heating by coronal soft X-rays, a numerically simulated hydrodynamic response of a solar flare loop to the thermal energy deposition around the top of the loop is described. Detailed evolutionary pictures have been obtained during the early stage of the impulsive phase for the conductively heated model, showing the fast heating of the flaring atmosphere, the formation and the development of chromospheric evaporation and condensation, the motion of the transition region, the consequences of the high-speed collision of evaporated material at the top.

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