Modeling the spectral-energy-distribution of 3C 454.3 in a "flat" broad-line-region scenario

Abstract

The broad-line region (BLR) of flat-spectrum radio quasars (FSRQs) could have a "flat" geometrical structure to allow GeV gamma-ray photons escape, to produce the observed gamma-ray flares with short timescales. In this paper, we collect the quasi-simultaneous spectral energy distributions (SEDs) of the FSRQ 3C 454.3 obtained by the multi-wavelength campaigns spanning from 2007 July to 2011 January, and use a model with the "flat" structure BLR, the accretion disc and the dust torus to explain the SEDs of gamma-ray outbursts. We obtain the following results: (i) The jet is almost in equipartition between magnetic and particle energy densities during the outbursts; (ii) When the emitting region locates inside the cavity of the BLR, the covering factor $f_{\mathrm{BLR}}$ of the BLR is very small; as the emitting region goes into the BLR structure, $f_{\mathrm{BLR}}$ increases. (iii) The aperture angle $\alpha$ describing the BLR structure is about $45^{\circ }$; (iv) The central black hole (BH) mass is about $5\times 10^8$\,$M_{\odot }$ rather than $4.4\times 10^9$\,$M_{\odot }$.

arXiv comment21 pages, 29 figures. Accepted for publication by PASJ

References in corpus (47)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• Polarimetric Observations of 15 Active Galactic Nuclei at High Frequencies: Jet Kinematics from Bimonthly Monitoring with the Very Long Baseline Array
• General physical properties of bright Fermi blazars
• Particle acceleration by ultra-relativistic shocks: theory and simulations
• Canonical high power blazars
• Constraints on the Physical Parameters of TeV Blazars
• The power of blazar jets
• Magnetic acceleration of relativistic AGN jets
• Particle acceleration at ultrarelativistic shocks: an eigenfunction method
• Synchrotron Self-Compton Analysis of TeV X-ray Selected BL Lacertae Objects
• Energy spectra of cosmic rays accelerated at ultrarelativistic shock waves
• GeV breaks in blazars as a result of gamma-ray absorption within the broad-line region
• Gamma-Ray Studies of Blazars: Synchro-Compton Analysis of Flat Spectrum Radio Quasars
• Fermi Gamma-ray Space Telescope Observations of the Gamma-ray Outburst from 3C 454.3 in November 2010
• On Pair Content and Variability of Sub-Parsec Jets in Quasars
• Constraining the location of the emitting region in Fermi blazars through rapid gamma-ray variability
• The unprecedented optical outburst of the quasar 3C 454.3. The WEBT campaign of 2004-2005
• Hot Graphite Dust and the Infrared Spectral Energy Distribution of Active Galactic Nuclei
• Early Fermi Gamma-ray Space Telescope Observations of the Quasar 3C 454.3
• Synchrotron Self-Compton Model for Rapid Nonthermal Flares in Blazars with Frequency-Dependent Time Lags
• Fermi Gamma-ray Space Telescope Observations of Recent Gamma-ray Outbursts from 3C 454.3
• Absorption of 10--200 Gev Gamma Rays by Radiation from BLR in Blazars
• On the masses of black-holes in radio-loud quasars
• The gamma-ray brightest days of the blazar 3C 454.3
• A new activity phase of the blazar 3C 454.3. Multifrequency observations by the WEBT and XMM-Newton in 2007-2008
• Multiwavelength observations of 3C 454.3. III. Eighteen months of AGILE monitoring of the "Crazy Diamond"
• Radiation fields of disk, BLR and torus in quasars and blazars: implications for gamma-ray absorption
• On the Spectral Break in the Fermi-LAT Spectrum of 3C 454.3
• Recollimation and Radiative Focusing of Relativistic Jets: Applications to Blazars and M87
• The brightest gamma-ray flaring blazar in the sky: AGILE and multi-wavelength observations of 3C 454.3 during November 2010
• Multiwavelength Variations of 3C 454.3 during the November 2010 to January 2011 Outburst
• The radio delay of the exceptional 3C 454.3 outburst. Follow-up WEBT observations in 2005-2006
• AGILE detection of a strong gamma-ray flare from the blazar 3C 454.3
• Multiwavelength observations of 3C 454.3. I. The AGILE 2007 November campaign on the "Crazy Diamond"
• Gamma-ray blazars near equipartition and the origin of the GeV spectral break in 3C 454.3
• WEBT and XMM-Newton observations of 3C 454.3 during the post-outburst phase. Detection of the little and big blue bumps
• Intrinsic absorption in 3C 279 at GeV-TeV energies and consequences for estimates of the EBL
• The high activity of 3C 454.3 in autumn 2007. Monitoring by the WEBT during the AGILE detection
• The December 2009 gamma-ray flare of 3C 454.3: the multifrequency campaign
• Multiwavelength observations of 3C 454.3 II. The AGILE 2007 December campaign
• Variation of the gamma-gamma opacity by the He II Lyman continuum constrains the location of the gamma-ray emission region in the blazar 3C 454.3
• Identifying Breaks and Curvature in the Fermi Spectra of Bright Flat Spectrum Radio Quasars
• MAGIC upper limits to the VHE gamma-ray flux of 3C454.3 in high emission state
• "Flat" broad line region and gamma-ray absorption in blazars
• The effect of the broad-line region with geometrical structures on gamma-ray absorption in blazars
• Constraint Propagation with Imprecise Conditional Probabilities

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