Synchrotron pair halo and echo emission from blazars in the cosmic web: application to extreme TeV blazars
arXiv:1406.6075 · doi:10.1051/0004-6361/201423798
Abstract
High frequency peaked high redshift blazars, are extreme in the sense that their spectrum is particularly hard and peaks at TeV energies. Standard leptonic scenarios require peculiar source parameters and/or a special setup in order to account for these observations. Electromagnetic cascades seeded by ultra-high energy cosmic rays (UHECR) in the intergalactic medium have also been invoked, assuming a very low intergalactic magnetic field (IGMF). Here we study the synchrotron emission of UHECR secondaries produced in blazars located in magnetised environments, and show that it can provide an alternative explanation to these challenged channels, for sources embedded in structured regions with magnetic field strengths of the order of G. To demonstrate this, we focus on three extreme blazars: 1ES 0229+200, RGB J0710+591, and 1ES 1218+304. We model the expected gamma-ray signal from these sources through a combination of numerical Monte Carlo simulations and solving the kinetic equations of the particles in our simulations, and explore the UHECR source and intergalactic medium parameter space to test the robustness of the emission. We show that the generated synchrotron pair halo/echo flux at the peak energy is not sensitive to variations in the overall IGMF strength. This signal is unavoidable in contrast to the inverse Compton pair halo/echo intensity, which is appealing in view of the large uncertainties on the IGMF in voids of large scale structure. It is also shown that the variability of blazar gamma-ray emission can be accommodated by the synchrotron emission of secondary products of UHE neutral beams if these are emitted by UHECR accelerators inside magnetised regions.
arXiv comment11 pages, 9 figures, to appear in A&A
References in corpus (81)
- Unified Schemes for Radio-Loud Active Galactic Nuclei
- Cosmological Hydrodynamics with Adaptive Mesh Refinement: a new high resolution code called RAMSES
- Evidence for strong extragalactic magnetic fields from Fermi observations of TeV blazars
- The extragalactic optical-infrared background radiations, their time evolution and the cosmic photon-photon opacity
- Cluster Magnetic Fields
- The Second Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
- BL Lac Objects in the Synchrotron Proton Blazar Model
- A low level of extragalactic background light as revealed by gamma-rays from blazars
- A New Radio - X-Ray Probe of Galaxy Cluster Magnetic Fields
- TeV Gamma Rays from BL Lac Objects due to Synchrotron Radiation of Extremely High Energy Protons
- On astrophysical solution to ultra high energy cosmic rays
- Constraints on the Physical Parameters of TeV Blazars
- The Astrophysics of Ultrahigh Energy Cosmic Rays
- A Proton Synchrotron Blazar Model for Flaring in Markarian~501
- EGMF Constraints from Simultaneous GeV-TeV Observations of Blazars
- Implications of Cosmological Gamma-Ray Absorption II. Modification of gamma-ray spectra
- Constrained Simulations of the Magnetic Field in the Local Universe and the Propagation of UHECRs
- Lower limit on the strength and filling factor of extragalactic magnetic fields
- Energy spectra of gamma-rays, electrons and neutrinos produced at interactions of relativistic protons with low energy radiation
- Cosmological Magnetic Fields Limits in an Inhomogeneous Universe
- New constraints on the Mid-IR EBL from the HESS discovery of VHE gamma rays from 1ES 0229+200
- Cosmogenic Neutrinos: parameter space and detectabilty from PeV to ZeV
- Hard X-ray properties of blazars
- Blazars as Ultra-High-Energy Cosmic-Ray Sources: Implications for TeV Gamma-Ray Observations
- Time Delay of Cascade Radiation for TeV Blazars and the Measurement of the Intergalactic Magnetic Field
- Sensitivity of the High Altitude Water Cherenkov Detector to Sources of Multi-TeV Gamma Rays
- Very High Energy Gamma-Rays from AGN: Cascading on the Cosmic Background Radiation Fields and the Formation of Pair Halos
- Cosmological Origin for Cosmic Rays Above eV
- Extreme TeV blazars and the intergalactic magnetic field
- A new estimate of the extragalactic radio background and implications for ultra-high-energy gamma-ray propagation
- A new interpretation of the gamma-ray observations of active galactic nuclei
- Extragalactic Background Light from Hierarchical Galaxy Formation: Gamma-ray Attenuation up to the Epoch of Cosmic Reionization and the First Stars
- Determination of intergalactic magnetic fields from gamma ray data
- Giant AGN Flares and Cosmic Ray Bursts
- Cluster Magnetic Fields from Galactic Outflows
- Indications for a pair-production anomaly from the propagation of VHE gamma-rays
- Fermi/LAT observations of 1ES 0229+200: implications for extragalactic magnetic fields and background light
- Secondary photons and neutrinos from cosmic rays produced by distant blazars
- Constraints on the VHE Emissivity of the Universe from the Diffuse GeV Gamma-Ray Background
- Detection of VHE gamma-ray emission from the distant blazar 1ES 1101-232 with H.E.S.S. and broadband characterisation
- Shear acceleration in relativistic astrophysical jets
- UHECRs from magnetic reconnection in relativistic jets
- Formation of hard very-high energy spectra of blazars in leptonic models
- Anisotropy vs chemical composition at ultra-high energies
- Constraints on Cosmic Rays, Magnetic Fields, and Dark Matter from Gamma-Ray Observations of the Coma Cluster of Galaxies with VERITAS and Fermi
- Discovery of VHE gamma-rays from the distant BL Lac 1ES 0347-121
- Discovery of VHE gamma-ray emission from 1ES1218+30.4
- Variable Gamma-ray Emission Induced by Ultra-High Energy Neutral Beams: Application to 4C +21.35
- CRPropa 2.0 -- a Public Framework for Propagating High Energy Nuclei, Secondary Gamma Rays and Neutrinos
- On photohadronic processes in astrophysical environments
- Gamma-ray induced cascades and magnetic fields in intergalactic medium
- Probing Intergalactic Magnetic Fields in the GLAST Era through Pair Echo Emission from TeV Blazars
- The Discovery of gamma-Ray Emission From The Blazar RGB J0710+591
- A Three-Year Multi-Wavelength Study of the Very High Energy Gamma-ray Blazar 1ES 0229+200
- Point-like gamma ray sources as signatures of distant accelerators of ultra high energy cosmic rays
- The optical depth of the Universe to ultrahigh energy cosmic ray scattering in the magnetized large scale structure
- Propagation of UHE Protons through Magnetized Cosmic Web
- GeV Emission from TeV Blazars and Intergalactic Magnetic Fields
- Discovery of Variability in the Very High Energy Gamma-Ray Emission of 1ES 1218+304 with VERITAS
- Implications of Ultra-High-Energy Cosmic Rays for Transient Sources in the Auger Era
- Inhomogeneous extragalactic magnetic fields and the second knee in the cosmic ray spectrum
- Ultrahigh-Energy Photons as a Probe of Nearby Transient Ultrahigh-Energy Cosmic-Ray Sources and Possible Lorentz-Invariance Violation
- TeV gamma rays from blazars beyond z=1?
- Cen A as TeV gamma-ray and possible UHE cosmic-ray source
- Lower limits on ultrahigh-energy cosmic ray and jet powers of TeV blazars
- High-Energy Emission Induced by Ultra-High-Energy Photons as a Probe of Ultra-High-Energy Cosmic-Ray Accelerators Embedded in the Cosmic Web
- Cascading on extragalactic background light
- On the hadronic cascade scenario for extreme BL Lacs
- Disentangling Hadronic and Leptonic Cascade Scenarios from the Very-High-Energy Gamma-Ray Emission of Distant Hard-Spectrum Blazars
- A New Model for Gamma-Ray Cascades in Extragalactic Magnetic Fields
- Modeling the hard TeV spectra of blazars 1ES 0229+200 and 3C 66A with an internal absorption scenario
- Large scale environments of z<0.4 active galaxies
- Understanding the spectrum of a distant blazar PKS 1424+240 and its implications
- Gamma ray signatures of ultra high energy cosmic ray accelerators: electromagnetic cascade versus synchrotron radiation of secondary electrons
- Detectability of ultrahigh energy cosmic ray signatures in gamma rays
- Gamma Rays from Ultra-High Energy Cosmic Rays in Cygnus A
- VERITAS Observations of the BL Lac Object 1ES 1218+304
- VERITAS observations of the BL Lac 1ES 1218+304
- The jet/disk connection in blazars
- A strict lower-limit EBL: Applications on gamma-ray absorption
- Non-variable cosmologically distant gamma-ray emitters as an imprint of propagation of ultra-high-energy protons
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- Open Questions in Cosmic-Ray Research at Ultrahigh Energies
- Progress in unveiling extreme particle acceleration in persistent astrophysical jets
- The Gamma-Ray Window to Intergalactic Magnetism
- An emerging population of BL Lacs with extreme properties: towards a class of EBL and cosmic magnetic field probes?
- Can we observe neutrino flares in coincidence with explosive transients?
- Electromagnetic cascade masquerade: a way to mimic --axion-like particle mixing effects in blazar spectra
- Physics of cosmological cascades and observable properties
- Isotropy constraints on powerful sources of ultrahigh-energy cosmic rays at eV
- Cosmogenic gamma-ray and neutrino fluxes from blazars associated with IceCube events
- The Intrinsic Gamma-Ray Spectrum of TXS 0506+056: Intergalactic Propagation Effects
- On conservative models of "the pair-production anomaly" in blazar spectra at Very High Energies
- Searches for correlation between UHECR events and high-energy gamma-ray Fermi-LAT data
- Gamma-ray counterparts of 2WHSP high-synchrotron-peaked BL Lac objects as possible signatures of ultra-high-energy cosmic-ray emission