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

Journal Article · · Astrophysical Journal
;  [1];  [2];  [3]
  1. Physics Department, Torino University, and Istituto Nazionale di Fisica Nucleare, Sezione di Torino, via Giuria 1, I-10125 Torino (Italy)
  2. II. Institute for Theoretical Physics, University of Hamburg, Luruper Chaussee 149, D-22761 Hamburg (Germany)
  3. Space Sciences Laboratory, University of California, Berkeley, CA 94720 (United States)

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.

OSTI ID:
22348228
Journal Information:
Astrophysical Journal, Vol. 780, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
Country of Publication:
United States
Language:
English

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Power spectrum tomography of dark matter annihilation with local galaxy distribution journal October 2014
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Planck Lensing and Cosmic Infrared Background Cross-correlation with Fermi -LAT: Tracing Dark Matter Signals in the Gamma-Ray Background journal February 2017
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Deriving the Contribution of Blazars to the Fermi -LAT Extragalactic γ -ray Background at E > 10 GeV with Efficiency Corrections and Photon Statistics journal March 2018
The Extragalactic Gamma-Ray Background from Core-dominated Radio Galaxies journal July 2019
The Circinus Galaxy Revisited with 10 yr Fermi -LAT Data journal November 2019
Determining the Core Radio Luminosity Function of Radio AGNs via Copula journal December 2018
Constraining particle dark matter using local galaxy distribution journal June 2016
IceCube neutrinos from hadronically powered gamma-ray galaxies journal September 2019
EVIDENCE OF CROSS-CORRELATION BETWEEN THE CMB LENSING AND THE γ -RAY SKY journal March 2015
Measurement of redshift-dependent cross-correlation of HSC clusters and Fermi γ-rays journal February 2019
Mapping dark matter in the gamma-ray sky with galaxy catalogs journal July 2014
Characterizing the local gamma-ray Universe via angular cross-correlations journal November 2018
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
Power spectrum tomography of dark matter annihilation with local galaxy distribution text January 2014
Evidence of cross-correlation between the CMB lensing and the gamma-ray sky text January 2014
The Origin of the Extragalactic Gamma-Ray Background and Implications for Dark-Matter Annihilation text January 2015
Limits on Dark Matter Annihilation Signals from the Fermi LAT 4-year Measurement of the Isotropic Gamma-Ray Background text January 2015
Dark matter searches in the gamma-ray extragalactic background via cross-correlations with galaxy catalogues text January 2015
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
A Case for Radio Galaxies as the Sources of IceCube's Astrophysical Neutrino Flux text January 2016
Planck Lensing and Cosmic Infrared Background Cross-Correlation with Fermi-LAT: Tracing Dark Matter Signals in the Gamma-Ray Background text January 2016
The relationship between the radio core-dominance parameter and spectral index in different classes of extragalactic radio sources (II) text January 2018
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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