Mathematics – Probability
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nascp3137..293b&link_type=abstract
In NASA. Goddard Space Flight Center, The Compton Observatory Science Workshop p 293-300 (SEE N92-21874 12-90)
Mathematics
Probability
1
Electron Photon Cascades, Gamma Ray Bursts, Magnetic Fields, Pair Production, Photons, X Rays, Astronomical Observatories, Continuums, Degradation, Flattening, Gamma Ray Spectra, Kinetic Equations, Probability Theory, Reclamation
Scientific paper
The splitting of photons into two photons becomes both possible and significant in magnetic fields in excess of 1012 Gauss. Below the threshold energy, 2me c2 for single photon pair production, splitting can be an astronomically observable phenomenon evident in gamma ray burst spectra. In such circumstances, it was found that magnetic photon splitting reprocesses the gamma ray burst continuum by degrading the photon energy, with a net effect that is quite similar to pair cascade reprocessing of the spectrum. Results are presented for the spectral modifications due to splitting, taking into account the different probabilities for splitting for different polarization modes. Unpolarized and polarized pair cascade photon spectra form the input spectra for the model, which calculates the resulting splitting reprocessed spectra numerically by solving the photon kinetic equations for each polarization mode. This inclusion of photon polarizations is found to not alter previous predictions that splitting produce a significant flattening of the hard X ray continuum and a bump at MeV energies below a pair production turnover. The spectrum near the bump is always strongly polarized.
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