Astronomy and Astrophysics – Astronomy
Scientific paper
May 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...214..268p&link_type=abstract
Astrophysical Journal, Part 1, vol. 214, May 15, 1977, p. 268-299.
Astronomy and Astrophysics
Astronomy
26
Astronomical Models, Black Holes (Astronomy), Compton Effect, Energy Spectra, Gamma Rays, X Ray Scattering, Angular Velocity, Astronomical Spectroscopy, Bursts, Plasma Radiation, Stellar Mass Accretion, X Ray Sources
Scientific paper
A model for the production of gamma-rays during the occurrence of instabilities in accretion of matter onto rapidly rotating black holes is described. Gamma rays are produced by Compton scattering of infalling X-ray photons whenever the optical depth in the deep ergosphere is of the order of the gravitational distance. The initial photons are produced farther away by viscous processes in the infalling plasma and contribute to the lower-energy regime of the burst spectrum, along with low-energy photons produced in the deep ergosphere. Calculated spectra for that specific Compton-scattering process may account for burst spectra in the range from approximately 300 keV to 3 MeV.
Piran Tsvi
Shaham Jacob
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