Gamma-Rays from Radio Galaxies: Fermi-Lat Observations

Abstract

We review the high energy properties of Misaligned AGNs associated with gamma-ray sources detected by Fermi in 24 months of survey. Most of them are nearby emission low power radio galaxies (i.e FRIs) which probably have structured jets. On the contrary, high power radio sources (i.e FRIIs) with GeV emission are rare. The small number of FRIIs does not seem to be related to their higher redshifts. Assuming proportionality between the radio core flux and the gamma-ray flux, several of them are expected to be bright enough to be detected above 100 MeV in spite of their distance. We suggest that beaming/jet structural differences are responsible for the detection rate discrepancy observed between FRIs and FRIIs.

To be published in the proceedings of High Energy Phenomena in Relativistic Outflows III (HEPRO III, IJMPCS); 6 pages, 3 figures

References in corpus (1)

• Implications for the structure of the relativistic jet from multiwavelength observations of NGC 6251

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