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Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983stin...8329164k&link_type=abstract
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Energetic Particles, Interplanetary Space, Particle Acceleration, Solar Flares, Optical Properties, Radio Frequency Interference, Shock Wave Propagation, Solar Corona
Scientific paper
The STIP Event No. 1, which covered the time interval August 14 - 18, 1979, was characterized by two energetic flares: one on August 14 (approximately 1243 UT) and the other on August 18 (approximately 1400 UT). The hard X-ray, soft X-ray, optical, radio and energetic particle emissions from these flares and their interplanetary effects were observed with many instruments in space and on the ground. A summary of some of these observations is presented. The results of a preliminary analysis relevant to the acceleration of particles, coronal transients and evolution of shocks are as follows: (1) During the August 14 flare energetic particles were probably accelerated but could not escape the Sun in large numbers. On the other hand, during the August 18 flare the acceleration of high energy particles occurred relatively high in the corona, from whence they could easily escape into interplanetary space but could not penetrate down to the lower altitudes in the solar atmosphere in large numbers. (2) The kinetic energy of the coronal transient associated with the August 14 flare was much larger than the total energy of energetic electrons, indicating an additional energy source for the transient. (3) The shock associated with the August 18 flare extended to greater than 2 (3.14) steradians. The shock maintained its speed from the flare site to a distance of approximately 35 R and then decelerated to a distance of approximately 1 AU as approximately R to the minus 0.8 power.
Bird Michael K.
Domingo Vicente
Gapper G. R.
Green Guenter
Hewish Antony
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