Physics – Space Physics
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983rvgsp..21..349r&link_type=abstract
(International Union of Geodesy and Geophysics, General Assembly, 18th, Hamburg, West Germany, Aug. 15-27, 1983) Reviews of Geop
Physics
Space Physics
6
Reviewing, Solar Flares, Bibliographies, Data Bases, H Alpha Line, Radiant Flux Density, Solar Corona, Solar Magnetic Field, Solar Radio Emission, Stellar Models, Ultraviolet Spectrometers, Very Large Array (Vla)
Scientific paper
The increased data base and scope of the theoretical models for solar flares are reviewed. Data have been gathered from the Skylab instrumentation, the Solar Maximum Mission, and the Very Large Array. Skylab X ray images revealed regularly spaced bright spots on the solar surface. Studies have also been performed on the emergence of magnetic fields, the coronal structures defined by magnetic fields above active regions, and the behavior and composition of post-flare loops. It has been found that coronal transients are associated with eruptive prominences with and without flares up to 70 pct of the time. Two classes of solar flares have been identified, i.e., small volume, low altitude with a short rise time, and long decay events with a larger coronal loop structure. Evidence for thermal and nonthermal causes for the electron velocity distribution in the flares is discussed. Finally, SMM data has shown chromospheric reactions to magnetic field variations in the photosphere and the response of the interplanetary medium to coronal transients.
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