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Title: Diffuse γ-ray emission from misaligned active galactic nuclei

Abstract

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. Here, 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). Furthermore, 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. These 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.

Authors:
 [1];  [2];  [1];  [3];  [4]
+ Show Author Affiliations
  1. Torino Univ. (Italy). Physics Dept.
  2. Univ. of Hamburg (Germany). Inst. for Theoretical Physics
  3. Univ. of California, Berkeley, CA (United States). Space Sciences Lab.
  4. National Inst. of Nuclear Physics, Torino (Italy)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
Fermi LAT Collaboration
OSTI Identifier:
1356539
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal
Additional Journal Information:
Journal Volume: 780; Journal Issue: 2; Journal ID: ISSN 0004-637X
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; diffuse radiation; galaxies: active; galaxies: luminosity function; mass function

Citation Formats

Di Mauro, M., Calore, F., Donato, F., Ajello, M., and Latronico, L. Diffuse γ-ray emission from misaligned active galactic nuclei. United States: N. p., 2013. Web. doi:10.1088/0004-637X/780/2/161.
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Di Mauro, M., Calore, F., Donato, F., Ajello, M., & Latronico, L. Diffuse γ-ray emission from misaligned active galactic nuclei. United States. https://doi.org/10.1088/0004-637X/780/2/161
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Di Mauro, M., Calore, F., Donato, F., Ajello, M., and Latronico, L. Fri . "Diffuse γ-ray emission from misaligned active galactic nuclei". United States. https://doi.org/10.1088/0004-637X/780/2/161. https://www.osti.gov/servlets/purl/1356539.
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@article{osti_1356539,
title = {Diffuse γ-ray emission from misaligned active galactic nuclei},
author = {Di Mauro, M. and Calore, F. and Donato, F. and Ajello, M. and Latronico, L.},
abstractNote = {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. Here, 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). Furthermore, 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. These 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},
journal = {The Astrophysical Journal},
number = 2,
volume = 780,
place = {United States},
year = {Fri Dec 20 00:00:00 EST 2013},
month = {Fri Dec 20 00:00:00 EST 2013}
}
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https://doi.org/10.1088/0004-637X/780/2/161
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    • Hashimoto, Daiki; Nishizawa, Atsushi J.; Shirasaki, Masato
    • Monthly Notices of the Royal Astronomical Society, Vol. 484, Issue 4
    • DOI: 10.1093/mnras/stz321

    Constraints on decaying dark matter from the extragalactic gamma-ray background
    text, January 2015

    Constraints on decaying dark matter from the extragalactic gamma-ray background
    journal, May 2015

    Unresolved Gamma-Ray Sky through its Angular Power Spectrum
    text, January 2018

    Evidence of cross-correlation between the CMB lensing and the gamma-ray sky
    text, January 2014

    A scenario of heavy but visible baryonic dark matter
    text, January 2015

    Evidence against star-forming galaxies as the dominant source of IceCube neutrinos
    text, January 2015

    The Extragalactic Gamma-Ray Background from Core Dominated Radio Galaxies
    text, January 2019

    Detection of cross-correlation between gravitational lensing and gamma rays
    text, January 2019

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