Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....41..395b&link_type=abstract
Astronomy and Astrophysics, vol. 41, no. 3-4, July 1975, p. 395-402. Research supported by the Dutch National Committee for Geo
Astronomy and Astrophysics
Astrophysics
6
Albedo, Photosphere, Solar X-Rays, X Ray Sources, Photons, Radiant Flux Density, Solar Atmosphere, Solar Spectra, Spatial Distribution, X Ray Scattering
Scientific paper
The importance and difficulties of determining the altitude of hard X-ray sources in the solar atmosphere are discussed. It is argued that the only unambiguous means of making this measurement is by utilizing the photospherically scattered component of the radiation. Specifically, it is proposed that this can be done by measurement of the angular distribution of the large patch of photospheric albedo X-rays which is shown to accompany bright point primary X-ray sources. Quantitative predictions are made of the brightness distribution of this albedo 'image' and the practical feasibility of observing it is demonstrated in terms of the hard X-ray imaging spectrometer currently under development at the Space Research Laboratory in Utrecht.
Brown John C.
McClymont Alexander N.
van Beek Frank H.
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