Dynamics of flare-driven chromospheric condensations

Details Dynamics of flare-driven chromospheric condensations Dynamics of flare-driven chromospheric condensations

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...346.1019f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 346, Nov. 15, 1989, p. 1019-1029.

Physics

Condensed Matter

58

Chromosphere, Condensed Matter Physics, Solar Atmosphere, Stellar Flares, Coronal Loops, Equations Of Motion, Solar Spectra, Solar X-Rays

Scientific paper

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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