Seed Photon Fields of Blazars in the Internal Shock Scenario

Abstract

We extend our approach of modeling spectral energy distribution (SED) and lightcurves of blazars to include external Compton (EC) emission due to inverse Compton scattering of an external anisotropic target radiation field. We describe the time-dependent impact of such seed photon fields on the evolution of multifrequency emission and spectral variability of blazars using a multi-zone time-dependent leptonic jet model, with radiation feedback, in the internal shock model scenario. We calculate accurate EC-scattered high-energy spectra produced by relativistic electrons throughout the Thomson and Klein-Nishina regimes. We explore the effects of varying the contribution of (1) a thermal Shakura-Sunyaev accretion disk, (2) a spherically symmetric shell of broad-line clouds, the broad line region (BLR), and (3) a hot infrared emitting dusty torus (DT), on the resultant seed photon fields. We let the system evolve to beyond the BLR and within the DT and study the manifestation of the varying target photon fields on the simulated SED and lightcurves of a typical blazar. The calculations of broadband spectra include effects of gamma-gamma absorption as gamma-rays propagate through the photon pool present inside the jet due to synchrotron and inverse Compton processes, but neglect gamma-gamma absorption by the BLR and DT photon fields outside the jet. Thus, our account of gamma-gamma absorption is a lower limit to this effect. Here, we focus on studying the impact of parameters relevant for EC processes on high-energy (HE) emission of blazars.

arXiv comment48 pages, 21 figures, Accepted for publication in ApJ

References in corpus (29)

• The Spectral Energy Distribution of Fermi bright blazars
• Polarimetric Observations of 15 Active Galactic Nuclei at High Frequencies: Jet Kinematics from Bimonthly Monitoring with the Very Long Baseline Array
• Turbulent, Extreme Multi-Zone Model for Simulating Flux and Polarization Variability in Blazars
• Canonical high power blazars
• Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?
• Comptonization of Infrared Radiation from Hot Dust by Relativistic Jets in Quasars
• Synchrotron Self-Compton Analysis of TeV X-ray Selected BL Lacertae Objects
• Rapid variability in the synchrotron self Compton model for blazars
• Gamma-Ray Studies of Blazars: Synchro-Compton Analysis of Flat Spectrum Radio Quasars
• A Tight Connection between Gamma-Ray Outbursts and Parsec-Scale Jet Activity in the Quasar 3C 454.3
• A Study of High Energy Emission from the TeV blazar Mrk 501 during Multiwavelength Observations in 1996
• Transformation Properties of External Radiation Fields, Energy-Loss Rates and Scattered Spectra, and a Model for Blazar Variability
• Absorption of 10--200 Gev Gamma Rays by Radiation from BLR in Blazars
• Timing Signatures of the Internal-Shock Model for Blazars
• On the Location of the Gamma-ray Emission in the 2008 Outburst in the BL Lacertae Object AO 0235+164 through Observations across the Electromagnetic Spectrum
• Radiation fields of disk, BLR and torus in quasars and blazars: implications for gamma-ray absorption
• Flare-like variability of the Mg IIλ2800Å emission line in the gamma-ray blazar 3C 454.3
• Emission from Hot Dust in the Infrared Spectra of Gamma-ray Bright Blazars
• Modeling Variable Emission Lines in AGNs: Method and Application to NGC 5548
• The connection between gamma-ray emission and millimeter flares in Fermi/LAT blazars
• External Compton Radiation from Rapid Nonthermal Flares in Blazars
• Mrk 421 active state in 2008: the MAGIC view, simultaneous multi-wavelength observations and SSC model constrained
• Time-dependent Radiation Transfer in the Internal Shock Model Scenario for Blazar Jets
• Analyzing the Multiwavelength Spectrum and Variability of BL Lacertae During the July 1997 Outburst
• 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
• Modeling the Multiwavelength Spectra and Variability of BL Lacertae in 2000
• The Multifrequency Campaign on 3C 279 in January 2006
• Exploring the relation between (sub-)millimeter radiation and gamma-ray emission in blazars with Planck and Fermi
• Compton scattering in the Klein-Nishina Regime Revisited

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