Physics
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...86..345s&link_type=abstract
(Japan Society for the Promotion of Science and National Science Foundation, U.S.-Japan Seminar on the Recent Advances in the Un
Physics
1
Coronal Loops, Dynamic Models, Solar Flares, Solar Prominences, Solar X-Rays, Kinetic Energy, Magnetic Flux, Solar Temperature
Scientific paper
The appearance of a hard X-ray source at the top of a coronal loop is treated in light of a model in which the dynamical effects of the dark filament mass infalling along the loop, in association with the 'disparition brusque', plays an important role. While the infalling mass impact generates high temperature regions in the low corona above the two footprints of the loop, upgoing shocks also generated by the impact (and strengthened during upward propagation along the steep density gradient in the tail of the infalling mass) produce a 100-million K region upon colliding with each other near the top of the loop. The occurrence of this process in successively higher loops of a magnetic arcade may account for the sources of gradual X-ray bursts appearing at the top of the loop-like structure.
Sakurai Takashi
Shibata Kazunari
Uchida Yoshiharu
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