The cosmological evolution models of active galaxies and the extragalactic gamma-ray background

Jul, 1990
4 pages
Published in:
  • Astrophys.J.Lett. 357 (1990) L1-L4
Report number:
  • LHEA-90-013

Citations per year

19911994199720002003102
Abstract:
The source spectra and angular fluctuations produced by various possible models of AGN evolution derived from observations in other wavelength bands are investigated. It is found that the sizes of the angular fluctuations are roughly constant between 10 and 100 MeV, independent of the models chosen. None of the models produce the spectral 'shelf' observed at a few MeV, and from the simulation, the AGN mechanism is only a minor contributor to the extragalactic gamma-ray background (EGB), with its flux only about 10 percent of what is observed. These evolution-independent effects imply that the EGB is not solely produced by the AGN mechanism.
Note:
  • In Kyoto U., Yukawa Inst. Library only
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