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DIFFUSE γ-RAY EMISSION FROM MISALIGNED ACTIVE GALACTIC NUCLEI

Di Mauro, M ; Calore, F ; Donato, F ; Ajello, M ; LATRONICO, L

The Astrophysical journal, 2014-01, Vol.780 (2), p.1-14 [Periódico revisado por pares]

United States: Institute of Physics (IOP)

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  • Título:
    DIFFUSE γ-RAY EMISSION FROM MISALIGNED ACTIVE GALACTIC NUCLEI
  • Autor: Di Mauro, M ; Calore, F ; Donato, F ; Ajello, M ; LATRONICO, L
  • Assuntos: Active galactic nuclei ; ASTRONOMY AND ASTROPHYSICS ; diffuse radiation ; Diffusion ; Emission ; Flux ; galaxies: active ; galaxies: luminosity function ; Jets ; Luminosity ; mass function ; Mathematical analysis ; Sky
  • É parte de: The Astrophysical journal, 2014-01, Vol.780 (2), p.1-14
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    USDOE
    AC02-76SF00515
  • Descrição: Active galactic nuclei (AGNs) with jets seen at small viewing angles are the most luminous and abundant objects in the gamma -ray sky. AGNs with jets misaligned along the line of sight appear fainter in the sky but are more numerous than the brighter blazars. We calculate the diffuse gamma -ray emission due to the population of misaligned AGNs (MAGNs) unresolved by the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope (Fermi). A correlation between the gamma -ray luminosity and the radio-core luminosity is established and demonstrated to be physical by statistical tests, as well as compatible with upper limits based on Fermi-LAT data for a large sample of radio-loud MAGNs. We constrain the derived gamma -ray luminosity function by means of the source-count distribution of the radio galaxies detected by the Fermi-LAT. We finally calculate the diffuse gamma -ray flux due to the whole MAGN population. Our results demonstrate that MAGNs can contribute from 10% up to nearly the entire measured isotropic gamma-ray background. We evaluate a theoretical uncertainty on the flux of almost an order of magnitude.
  • Editor: United States: Institute of Physics (IOP)
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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