Physics
Scientific paper
Oct 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...50..179k&link_type=abstract
Solar Physics, vol. 50, Sept.-Oct. 1976, p. 179-196.
Physics
15
Astronomical Photography, Skylab Program, Solar Flares, Solar X-Rays, Spaceborne Telescopes, X Ray Telescopes, Conductive Heat Transfer
Scientific paper
The physical parameters for the kernels of three solar X-ray flare events have been deduced using photographic data from the S-054 X-ray telescope on Skylab as the primary data source and 1-8 and 8-20 A fluxes from Solrad 9 as the secondary data source. The kernels had diameters of about 5-7 seconds of arc and in two cases electron densities at least as high as 0.3 trillion per cu cm. The lifetimes of the kernels were 5-10 min. The presence of thermal conduction during the decay phases is used to argue: (1) that kernels are entire, not small portions of, coronal loop structures, and (2) that flare heating must continue during the decay phase. We suggest a simple geometric model to explain the role of kernels in flares in which kernels are identified with emerging flux regions.
Kahler Stephen W.
Kane Sharad R.
Petrasso Richard D.
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