Statistics – Computation
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...323..391h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 323, Dec. 1, 1987, p. 391-398.
Statistics
Computation
6
Bremsstrahlung, Gamma Ray Astronomy, Solar Electrons, Solar Flares, Solar Protons, Solar X-Rays, Computational Astrophysics, Linear Polarization, Lorentz Transformations
Scientific paper
In this paper the polarization of proton-electron bremsstrahlung is studied. The differential cross sections for the emitted photon with linear polarization are obtained by Lorentz transformation of the well-known electron-proton bremsstrahlung. Appreciable polarization occurs near both the low- and high-energy ends of the photon spectrum. It is also shown that the maximum polarization is obtained in the direction perpendicular to the particle trajectory for low-energy photons, the bremsstrahlung in this case being like dipole emission. The resulting polarization from a proton spectrum in a thick target is also given. The degree and direction of the polarization of solar flare X-rays are predicted from the model (spiraling protons in the solar magnetic field). These results are discussed in connection with previously measured values.
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