Physics
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...79...85m&link_type=abstract
Solar Physics, vol. 79, July 1982, p. 85-106.
Physics
35
Solar Flares, Solar Maximum Mission, Solar X-Rays, Spatial Distribution, Temporal Distribution, Chromosphere, Cooling, Energy Dissipation, Satellite-Borne Instruments, X Ray Imagery
Scientific paper
Hard X-ray burst spectrometer and imaging spectrometer data are used to study the spatial and temporal characteristics of the 3.5-30.0 keV emission in an Apr. 10, 1980 solar flare. It is found that: (1) continuous energy release is needed to sustain the increase of the emission through the flare's rising phase, before and after the impulsive phase in hard X-rays, and the release is characterized by the production of 50 million-150 million K thermal regions within the flare loop structures; (2) the observational parameters which characterize the impulsive burst indicate that it is probably associated with nonthermal processes, such as particle acceleration; and (3) the continuous energy release is associated with strong chromospheric evaporation, in view of spectral line behavior. Both particle acceleration and chromospheric evaporation stop just before flare maximum, and the subsequent evolution is probably governed by the radiative cooling of the flare plasma.
Dennis Brian R.
Duijveman A.
Machado Marcos E.
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