Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...236..945s&link_type=abstract
Astrophysical Journal, Part 1, vol. 236, Mar. 15, 1980, p. 945-950.
Astronomy and Astrophysics
Astrophysics
17
Compton Effect, Gamma Ray Spectra, Pulsars, Relativistic Electron Beams, Seyfert Galaxies, Emission Spectra, Energy Spectra, Particle Energy, Photons, Point Sources
Scientific paper
An inverse Compton origin of the γ-ray emission of point sources reveals itself by a continuous steepening of the differential γ-ray spectrum with increasing energy due to higher order effects in the Klein-Nishina cross section. It is shown that the observed breaks in the γ-ray spectra of the Vela pulsar PSR 0833-45, the Crab pulsar NP 0532, and the Seyfert galaxy NGC 4151 can be explained quite naturally by this effect. The implied constraints on the mean energy of the target photon gases allow us to discuss the place of origin of the observed γ-rays.
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