We estimate the contribution of radio-loud active galactic nuclei to the gamma-ray background using the recent detections by GRO of BL Lacs and flat-spectrum radio quasars at energies > 100 MeV From the recently derived radio luminosity functions of these objects, together with the observed mean values of the gamma-ray to radio luminosity, we derive contributions of about 30 and 35 per cent, respectively, at 100 MeV. The total contribution of radio-loud sources is 66(-24)+31 per cent, leaving little room for a substantial contribution from radio-quiet active galactic nuclei, none of which has been detected so far. Our results assume that the detected sources are typical of the radio-loud population and not strongly variable; further gamma-ray detections and variability studies should allow a refinement of our estimate.

Radio-loud AGN and the extragalactic gamma-ray background

Celotti, Anna Lisa
1993-01-01

Abstract

We estimate the contribution of radio-loud active galactic nuclei to the gamma-ray background using the recent detections by GRO of BL Lacs and flat-spectrum radio quasars at energies > 100 MeV From the recently derived radio luminosity functions of these objects, together with the observed mean values of the gamma-ray to radio luminosity, we derive contributions of about 30 and 35 per cent, respectively, at 100 MeV. The total contribution of radio-loud sources is 66(-24)+31 per cent, leaving little room for a substantial contribution from radio-quiet active galactic nuclei, none of which has been detected so far. Our results assume that the detected sources are typical of the radio-loud population and not strongly variable; further gamma-ray detections and variability studies should allow a refinement of our estimate.
1993
260
L21
Padovani, P.; Ghisellini, G.; Fabian, A. C.; Celotti, Anna Lisa
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/14913
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