Active galactic nuclei (AGNs) with jets seen at small viewing angles are the most luminous and abundant objects in the γ-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 γ-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 γ-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 γ-ray luminosity function by means of the source-count distribution of the radio galaxies detected by the Fermi-LAT. We finally calculate the diffuse γ-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.
Di Mauro, M., et al. "Diffuse γ-ray emission from misaligned active galactic nuclei." Astrophysical Journal, vol. 780, no. 2, Jan. 2014. https://doi.org/10.1088/0004-637X/780/2/161
Di Mauro, M., Donato, F., Calore, F., & Ajello, M. (2014). Diffuse γ-ray emission from misaligned active galactic nuclei. Astrophysical Journal, 780(2). https://doi.org/10.1088/0004-637X/780/2/161
Di Mauro, M., Donato, F., Calore, F., et al., "Diffuse γ-ray emission from misaligned active galactic nuclei," Astrophysical Journal 780, no. 2 (2014), https://doi.org/10.1088/0004-637X/780/2/161
@article{osti_22348228,
author = {Di Mauro, M. and Donato, F. and Calore, F. and Ajello, M.},
title = {Diffuse γ-ray emission from misaligned active galactic nuclei},
annote = {Active galactic nuclei (AGNs) with jets seen at small viewing angles are the most luminous and abundant objects in the γ-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 γ-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 γ-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 γ-ray luminosity function by means of the source-count distribution of the radio galaxies detected by the Fermi-LAT. We finally calculate the diffuse γ-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.},
doi = {10.1088/0004-637X/780/2/161},
url = {https://www.osti.gov/biblio/22348228},
journal = {Astrophysical Journal},
issn = {ISSN 0004-637X},
number = {2},
volume = {780},
place = {United States},
year = {2014},
month = {01}}
HIGH ENERGY GAMMA-RAY ASTRONOMY: 2nd International Symposium on High Energy Gamma-Ray Astronomy, AIP Conference Proceedingshttps://doi.org/10.1063/1.1878466