Simulations of Stochastic Long-Term Variability in Leptonic Models for External-Compton and Synchrotron Self-Compton Dominated Blazars

Abstract

In this work we investigate the nature of multi-wavelength variability of blazars from a purely numerical approach. We use a time-dependent one-zone leptonic blazar emission model to simulate multi-wavelength variability by introducing stochastic parameter variations in the emission region. These stochastic parameter variations are generated by Monte Carlo methods and have a characteristic power law index of $\alpha =-2$ in their power spectral densities. We include representative blazar test cases for a flat spectrum radio quasar and a high synchrotron peaked BL Lacertae object for which the high energy component of the Spectral Energy Distribution is dominated by external Compton and synchrotron self-Compton emission, respectively. The simulated variability is analyzed in order to characterise the distinctions between the two blazar cases and the physical parameters driving the variability. We show that the variability's power spectrum is closely related to underlying stochastic parameter variations for both cases. Distinct differences between the different progenitor variations are present in the multi-wavelength cross-correlation functions.

arXiv comment19 pages, 13 figures; Accepted in ApJ

References in corpus (29)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The Spectral Energy Distribution of Fermi bright blazars
• An Exceptional VHE Gamma-Ray Flare of PKS 2155-304
• Variable VHE gamma-ray emission from Markarian 501
• Gamma-ray Light Curves and Variability of Bright Fermi-Detected Blazars
• Relativistic Jets Shine through Shocks or Magnetic Reconnection?
• Relativistic Jets in Active Galactic Nuclei und Microquasars
• Diffusive Acceleration of Particles at Oblique, Relativistic, Magnetohydrodynamic Shocks
• Long-term optical monitoring of TeV emitting Blazars
• Rapid TeV variability in Blazars as result of Jet-Star Interaction
• Gamma rays from cloud penetration at the base of AGN jets
• Rapid TeV Gamma-Ray Flaring of BL Lacertae
• RoboPol: Connection between optical polarization plane rotations and gamma-ray flares in blazars
• Detection of Possible Quasi-periodic Oscillations in the Long-term Optical Light Curve of the BL Lac Object OJ 287
• Radiative Signatures of Plasmoid-Dominated Reconnection in Blazar Jets
• Stochastic modeling of multiwavelength variability of the classical BL Lac object OJ 287 on timescales ranging from decades to hours
• Mrk 421 as a case study for TeV and X-ray variability in leptohadronic models
• Probing Acceleration and Turbulence at Relativistic Shocks in Blazar Jets
• Fourier Analysis of Blazar Variability
• Characterizing the gamma-ray long-term variability of PKS 2155-304 with H.E.S.S. and Fermi-LAT
• Multi-wavelength variability study of the classical BL Lac object PKS 0735+178 on timescales ranging from decades to minutes
• Cloud ablation by a relativistic jet and the extended flare in CTA 102 in 2016 and 2017
• Possible Accretion Disk Origin of the Emission Variability of a Blazar Jet
• Radio Variability and Random Walk Noise Properties of Four Blazars
• Fourier Analysis of Blazar Variability: Klein-Nishina Effects and the Jet Scattering Environment
• Blazar variability power spectra from radio up to TeV photon energies: Mrk 421 and PKS 2155-304
• Leptonic and Lepto-Hadronic Modeling of the Nov. 2010 flare from 3C 454.3
• Optical variability power spectrum analysis of blazar sources on intranight timescales
• A numerical study of long-term multi-wavelength blazar variability

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