Other
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...248l..39c&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 248, Aug. 15, 1981, p. L39-L43.
Other
43
Line Spectra, Solar Flares, Solar Spectra, Solar X-Rays, Spatial Resolution, Ultraviolet Spectra, Electron Energy, Emission Spectra, Light Curve, Oxygen Spectra, Silicon, Solar Maximum Mission, Spectrum Analysis
Scientific paper
New observations are presented of impulsive UV and hard X-rays bursts in two solar flares obtained with instruments on Solar Maximum Mission. The UV bursts were observed in the Si IV and O IV emission lines, whose intensity ratio is density-sensitive. By comparing the spatially resolved Si IV/O IV observations with the corresponding hard X-ray observations, it is possible to study their spatial and temporal relationships. For one flare, the individual component spikes in the multiply peaked hard X-ray burst can be identified with different discrete Si IV/O IV flaring kernels of size 4 arcsec x 4 arcsec or smaller, which brighten up sequentially in time. For the other, many Si IV/O kernels, widely distributed over a large area, show impulsive bursts at the same time, which correlate with the main peak of the impulsive hard X-ray burst. The density of the flaring Si IV/O IV kernels is in the range from 5 x 10 to the 12th-13th/cu cm.
Bruner E. C.
Cheng Chung-Chieh
Frost Kenneth J.
Kenny Peter J.
Orwig L.
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