A theory of gamma-ray bursts based on resonant Compton scattering

Details A theory of gamma-ray bursts based on resonant Compton scattering A theory of gamma-ray bursts based on resonant Compton scattering

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...374..668v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 374, June 20, 1991, p. 668-686. Research supported by Lawrence Livermore Na

Astronomy and Astrophysics

Astrophysics

11

Black Body Radiation, Compton Effect, Gamma Ray Bursts, Magnetic Stars, Neutron Stars, Photons, Cyclotron Resonance, Electron Beams, Electron-Positron Pairs, Positrons, Radiative Transfer, Surface Temperature

Scientific paper

Photon spectra produced from the resonant Compton scattering of blackbody photons by a beam of energetic electrons and positrons are calculated. A range of surface temperatures near 1 keV and magnetic field strengths near 10 to the 12th G are studied for monoenergetic and power-law electron and positron source functions. Photon spectra similar to observed gamma-ray burst spectra are obtained for power-law beam injection functions with low-energy cutoffs. It is proposed that gamma-ray bursts are the resonant scattered emission of electron-positron pairs injected very close to the surface of a neutron star. Depending on the temperature and magnetic field, the mean free path for energy loss can be a fraction of the neutron star radius. The cyclotron features observed in gamma-ray burst spectra are due to complicated radiative transfer effects of photons with energies near the cyclotron fundamental and higher harmonics.

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