Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...88..281b&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 88, Oct. 1983, p. 281-295. Research supported by the Science and Engineering Research Counc
Astronomy and Astrophysics
Astronomy
22
Height, Solar Activity, Solar X-Rays, X Ray Astronomy, Astronomical Models, Bremsstrahlung, Chromosphere, Occultation, Solar Corona, Spaceborne Astronomy
Scientific paper
The thick target, hard solar X-ray source height structure is predicted for the case of a beam that is injected vertically downward, having a power law spectrum, being dominated by Coulomb collisional energy losses, and being structurally characterized by the ratio of hard X-ray flux from an upper part of the source to that from the entire source. These predictions are compared with the flux ratios at 150 and 350 keV which were observed by two spacecraft for five events in which the solar limb occults part of the source for one spacecraft. The energy dependence of the occultation ratio is found to be inconsistent with that predicted by the model, and it is concluded that noncollisional losses must be significant in beam dynamics.
Brown John C.
Carlaw Vivette A.
Cromwell David
Kane Sharad R.
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