Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...107..378s&link_type=abstract
Astronomy and Astrophysics, vol. 107, no. 2, Mar. 1982, p. 378-384. Deutsche Forschungsgemeinschaft
Astronomy and Astrophysics
Astronomy
8
Gamma Ray Astronomy, Optical Thickness, Absorptivity, Bremsstrahlung, Compton Effect, Electrons, Inverse Scattering, Radiative Transfer, Relativistic Particles
Scientific paper
The hypothesis is discussed that some of the unidentified gamma ray point sources are objects which emit only at the highest frequencies but are optically thick against stimulated Compton scattering or nonthermal electron bremsstrahlung reabsorption at lower frequencies. From the calculated absorption coefficients it follows that such a scenario is only possible for inverse Compton scattering under extreme conditions which may hold in the core of powerful sources. This would mean that these gamma ray point sources are very energetic and compact objects. However, relativistic electron bremsstrahlung optically thick objects do not occur in nature.
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