Dynamics of Flare-driven Chromospheric Condensations
Abstract
A general model of chromospheric condensation dynamics is developed under the assumption of sudden impulsive-phase flare energy release. The basic equation of motion for the downward-moving condensation is derived from the momentum equation and from general features seen in numerical simulations. This equation is solved for a number of different cases. The 'lifetime' of condensation and the time for the velocity to drop to half its peak value are computed. The peak downflow speed is examined as a function of the flare energy flux, and comparisons are made between downflow speeds predicted by both thick-target 'explosive evaporation' and evaporation driven conductively.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1989
- DOI:
- 10.1086/168084
- Bibcode:
- 1989ApJ...346.1019F
- Keywords:
-
- Chromosphere;
- Condensed Matter Physics;
- Solar Atmosphere;
- Stellar Flares;
- Coronal Loops;
- Equations Of Motion;
- Solar Spectra;
- Solar X-Rays;
- Solar Physics;
- HYDRODYNAMICS;
- SUN: ATMOSPHERIC MOTIONS;
- SUN: CHROMOSPHERE;
- SUN: FLARES