Backscatter, anisotropy, and polarization of solar hard X-rays

Details Backscatter, anisotropy, and polarization of solar hard X-rays Backscatter, anisotropy, and polarization of solar hard X-rays

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...219..705b&link_type=abstract

Astrophysical Journal, Part 1, vol. 219, Jan. 15, 1978, p. 705-726.

Astronomy and Astrophysics

Astrophysics

121

Anisotropy, Backscattering, Compton Effect, Polarization (Waves), Solar Flares, Solar X-Rays, X Ray Spectra, Albedo, Angular Distribution, Bremsstrahlung, Coherent Radiation, Monte Carlo Method, Photosphere, Scattering Cross Sections, Solar Limb, Stokes Law Of Radiation

Scientific paper

The problems of anisotropy, polarization, center-to-limb variation of the X-ray spectrum, and Compton backscatter are investigated in a study of solar hard X-rays. Effect of backscatter are found particularly important for anisotropic sources which emit hard X-rays predominantly toward the photosphere; for such anisotropic primary X-ray sources, the observed X-ray flux near 30 keV does not depend significantly on the position of the flare. In addition, the degree of polarization of the sum of the primary and reflected X-rays with energies in the 15 to 30 keV range may be as high as 30%. Determination of the height and anisotropy of the primary X-ray sources from study of the albedo patch is also discussed.

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