Physics
Scientific paper
Sep 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.459..353w&link_type=abstract
In: Exploring the gamma-ray universe. Proceedings of the Fourth INTEGRAL Workshop, 4-8 September 2000, Alicante, Spain. Editor:
Physics
Active Galaxies, Gamma-Ray Background, Diffuse Radiation
Scientific paper
Recent results on the high-energy extragalactic background radiation suggest that it arises from the superposed emission of unresolved point sources. Seyfert galaxies and blazars have been identified as viable source classes at X-ray energies and high gamma-ray energies, respectively. The situation is less clear in the ~0.1 - 10 MeV transition region, where a variety of source populations, among which are supernovae and blazars, are expected to contribute. We present an estimate of the contribution of FR I radio galaxies to the extragalactic gamma-ray background around 1 MeV, based on the FR I radio luminosity function and the high-energy emission properties of the Faranoff-Riley class I radio galaxy Centaurus A.
Steinle Helmut
Weidenspointner Georg
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