VHE Gamma-Ray Induced Pair Cascades in the Radiation Fields of Dust Tori of AGN: Application to Cen A
arXiv:1012.3923 · doi:10.1088/0004-637X/728/2/134
Abstract
The growing number of extragalactic high-energy (HE, E > 100 MeV) and very-high-energy (VHE, E > 100 GeV) gamma-ray sources that do not belong to the blazar class suggests that VHE gamma-ray production may be a common property of most radio-loud Active Galactic Nuclei (AGN). In a previous paper, we have investigated the signatures of Compton-supported pair cascades initiated by VHE gamma-ray absorption in monochromatic radiation fields, dominated by Ly-alpha line emission from the Broad Line Region. In this paper, we investigate the interaction of nuclear VHE gamma-rays with the thermal infrared radiation field from a circumnuclear dust torus. Our code follows the spatial development of the cascade in full 3-dimensional geometry. We provide a model fit to the broadband SED of the dust-rich, gamma-ray loud radio galaxy Cen A and show that typical blazar-like jet parameters may be used to model the broadband SED, if one allows for an additional cascade contribution to the Fermi gamma-ray emission.
arXiv commentAccepted for publication in The Astrophysical Journal
References in corpus (30)
- Unified Schemes for Radio-Loud Active Galactic Nuclei
- A theoretical unifying scheme for gamma-ray bright blazars
- An Exceptional VHE Gamma-Ray Flare of PKS 2155-304
- Correlation of the highest energy cosmic rays with nearby extragalactic objects
- Variable VHE gamma-ray emission from Markarian 501
- Bright AGN Source List from the First Three Months of the Fermi Large Area Telescope All-Sky Survey
- Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
- Fermi Gamma-ray Imaging of a Radio Galaxy
- GeV breaks in blazars as a result of gamma-ray absorption within the broad-line region
- Fermi Discovery of Gamma-Ray Emission from NGC 1275
- Fermi Large Area Telescope Gamma-Ray Detection of the Radio Galaxy M87
- Fermi Large Area Telescope Observations of Misaligned AGN
- X-Ray Spectral Variability Signatures of Flares in BL Lac Objects
- Fermi Large Area Telescope View of the Core of the Radio Galaxy Centaurus A
- Resolving the innermost parsec of Centaurus A at mid-infrared wavelengths
- VERITAS Discovery of >200GeV Gamma-ray Emission from the Intermediate-frequency-peaked BL Lac Object W Comae
- Radiation fields of disk, BLR and torus in quasars and blazars: implications for gamma-ray absorption
- Multiwavelength observations of a TeV-Flare from W Comae
- Unveiling the Active Nucleus of Centaurus A
- GeV emission from the nearby radio galaxy Centaurus A
- X-ray Observations of BL Lacertae During 1997 Outburst and its Association with Quasar-like Characteristics
- The redshift-dependence of gamma-ray absorption in the environments of strong-line AGN
- Analyzing the Multiwavelength Spectrum and Variability of BL Lacertae During the July 1997 Outburst
- Ten milliparsec-scale structure of the nucleus region in Centaurus A
- Is the EGRET source 3EG J1621+8203 the radio galaxy NGC 6251?
- Absorption of 10 Gev--1 Tev Gamma Rays by Radiation from Broad-Line Region in 3C 279
- Photon-photon absorption above a molecular cloud torus in blazars
- Gamma-Ray Emission from the Broad-Line Radio Galaxy 3C111
- VHE Gamma-Ray Induced Pair Cascades in Blazars and Radio Galaxies: Application to NGC 1275
- Centaurus A at Hard X-rays and Soft Gamma-rays
Cited by in corpus (29)
- First X-ray-Based Statistical Tests for Clumpy-Torus Models: Eclipse Events from 230 Years of Monitoring of Seyfert AGN
- Evidence for a second component in the high-energy core emission from Centaurus A?
- The -ray spectrum of the core of Centaurus A as observed with H.E.S.S. and Fermi-LAT
- Radio Galaxies at VHE energies
- Gamma-Ray Observational Properties of TeV-Detected Blazars
- Dual-frequency VLBI study of Centaurus A on sub-parsec scales
- Hadronic-Origin TeV gamma-Rays and Ultra-High Energy Cosmic Rays from Centaurus A
- One-zone SSC model for the core emission of Centaurus A revisited
- Hadronic-Origin orphan TeV flare from the 1ES 1959+650
- Very High Energy outburst of Markarian 501 in May 2009
- Multi-TeV flaring from blazars: Markarian 421 a case study
- Some possible sources of IceCube TeV-PeV neutrino events
- Studies of active galactic nuclei with CTA
- How gravitational lensing helps gamma-ray photons avoid absorption
- Circumnuclear Dust in AP Librae and the source of its VHE emission
- Gamma-Rays from Non-Blazar AGN
- GeV-TeV gamma-rays produced by electrons in the kpc scale jet as a result of comptonization of the inner jet emission
- Very high-energy gamma-ray signature of ultrahigh-energy cosmic-ray acceleration in Centaurus A
- The origin of multi-TeV flares from the nearest blazar Markarian 421
- EBL effect on the observation of multi-TeV flaring of 2009 from Markarian 501
- Photohadronic scenario in interpreting the February-March 2014 flare of 1ES 1011+496
- Synchrotron Emission from VHE Gamma-Ray Induced Pair Cascades in AGN Environments
- The nature of the intrinsic spectra from the VHE emission of H 2356-309 and 1ES 1101-232
- Two blobs in a jet model for the gamma-ray emission in radio galaxies
- Absorption effects in the blazar's gamma-ray spectra due to luminous stars crossing the jet
- A Soft X-Ray Lag Detected in Centaurus A
- Ultra High Energy Neutrino Event KM3-230213A as a Signal of Electroweak Vacuum Turbulence in Merging Black Hole Binaries
- Probing cluster environments of blazars through gamma-gamma absorption
- Photo-Disintegration of Heavy Nuclei at the Core of Cen A