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|Title:||Dynamics of flare-driven chromospheric condensations|
|Authors:||Fisher, George H.|
|Affiliation:||AA(Hawaii, University, Honolulu; Lawrence Livermore National Laboratory, Livermore, CA)|
|Publication:||Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 346, Nov. 15, 1989, p. 1019-1029. (ApJ Homepage)|
|NASA/STI Keywords:||Chromosphere, Condensed Matter Physics, Solar Atmosphere, Stellar Flares, Coronal Loops, Equations Of Motion, Solar Spectra, Solar X-Rays|
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.
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