Structured jets in BL Lac objects: efficient PeV neutrino factories?

Abstract

The origin of the high-energy neutrinos (0.1$-$1 PeV range) detected by IceCube remains a mystery. In this work we explore the possibility that efficient neutrino production can occur in structured jets of BL Lac objects, characterized by a fast inner spine surrounded by a slower layer. This scenario has been widely discussed in the framework of the high-energy emission models for BL Lacs and radiogalaxies. One of the relevant consequences of a velocity structure is the enhancement of the inverse Compton emission caused by the radiative coupling of the two zones. We show that a similar boosting could occur for the neutrino output of the spine through the photo-meson reaction of high-energy protons scattering off the amplified soft target photon field of the layer. Assuming the local density and the cosmological evolution of $\gamma$-ray BL Lac derived from {\it Fermi}-LAT data, we calculate the expected diffuse neutrino intensity, that can match the IceCube data for a reasonable choice of the parameters.

5 pages, 2 figures, accepted for publication in ApJ Letters

References in corpus (24)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
• Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data
• A theoretical unifying scheme for gamma-ray bright blazars
• High Energy Neutrinos from Astrophysical Sources: An Upper Bound
• KASCADE measurements of energy spectra for elemental groups of cosmic rays: Results and open problems
• BL Lac Objects in the Synchrotron Proton Blazar Model
• Structured jets in TeV BL Lac objects and radiogalaxies
• On astrophysical solution to ultra high energy cosmic rays
• Diffuse Neutrino Intensity from the Inner Jets of Active Galactic Nuclei: Impacts of External Photon Fields and the Blazar Sequence
• The Cosmic Evolution of Fermi BL Lacertae Objects
• Neutral Beams from Blazar Jets
• Blazars as Ultra-High-Energy Cosmic-Ray Sources: Implications for TeV Gamma-Ray Observations
• TeV BL Lac objects at the dawn of the Fermi era
• The spectrum of high-energy cosmic rays measured with KASCADE-Grande
• Spine-sheath layer radiative interplay in subparsec-scale jets and the TeV emission from M87
• Cosmic Neutrino Pevatrons: A Brand New Pathway to Astronomy, Astrophysics, and Particle Physics
• Are both BL Lacs and pulsar wind nebulae the astrophysical counterparts of IceCube neutrino events?
• High-energy neutrinos from radio galaxies
• The jet of Markarian 501 from millions of Schwarzschild radii down to a few hundreds
• Acceleration of Ultra-High Energy Cosmic Rays in the Colliding Shells of Blazars and GRBs: Constraints from the Fermi Gamma ray Space Telescope
• On the hadronic cascade scenario for extreme BL Lacs
• Constraints on The Hadronic Content of Gamma Ray Bursts
• Photopion Production in Black-Hole Jets and Flat-Spectrum Radio Quasars as PeV Neutrino Sources

Cited by in corpus (63)

• Hidden Cosmic-Ray Accelerators as an Origin of TeV-PeV Cosmic Neutrinos
• A Multimessenger Picture of the Flaring Blazar TXS 0506+056: implications for High-Energy Neutrino Emission and Cosmic Ray Acceleration
• The contribution of Fermi-2LAC blazars to the diffuse TeV-PeV neutrino flux
• The blazar TXS 0506+056 associated with a high-energy neutrino: insights into extragalactic jets and cosmic ray acceleration
• Constraining High-Energy Cosmic Neutrino Sources: Implications and Prospects
• Photohadronic origin of $\gamma$-ray BL Lac emission: implications for IceCube neutrinos
• Relativistic Jets in Active Galactic Nuclei und Microquasars
• Spectral analysis of the high-energy IceCube neutrinos
• Progress in unveiling extreme particle acceleration in persistent astrophysical jets
• Multi-Epoch Modeling of TXS 0506+056 and Implications for Long-Term High-Energy Neutrino Emission
• Radio observations of active galactic nuclei with mm-VLBI
• A two-zone model for blazar emission: implications for TXS 0506+056 and the neutrino event IceCube-170922A
• On the magnetization of BL Lac jets
• A Possible Two-component Flux for the High Energy Neutrino Events at IceCube
• Neutrinos and Ultra-High-Energy Cosmic-Ray Nuclei from Blazars
• Through The Ring Of Fire: $\gamma$-Ray Variability In Blazars By A Moving Plasmoid Passing A Local Source Of Seed Photons
• High energy neutrino flux from individual blazar flares
• Analysis of the 4-year IceCube high-energy starting events
• Patterns in the multi-wavelength behavior of candidate neutrino blazars
• A Neutral Beam Model for High-Energy Neutrino Emission from the Blazar TXS 0506+056
• Extragalactic plus Galactic model for IceCube neutrino events
• First-Epoch VLBA Imaging of Twenty New TeV Blazars
• Broadband characterisation of the very intense TeV flares of the blazar 1ES 1959+650 in 2016
• Neutrino emission from BL Lac objects: the role of radiatively inefficient accretion flows
• A two-zone blazar radiation model for "orphan" neutrino flares
• Very high energy neutrino emission from the core of low luminosity AGNs triggered by magnetic reconnection acceleration
• Common envelope jets supernovae with a black hole companion as possible high energy neutrino sources
• Probing decaying heavy dark matter with the 4-year IceCube HESE data
• Boosted Dark Matter and its implications for the features in IceCube HESE data
• Open Universe for Blazars: a new generation of astronomical products based on 14 years of Swift-XRT data
• Constraints of Flat Spectrum Radio Quasars in the hadronic model: the case of 3C 273
• High-energy emitting BL Lacs and high-energy neutrinos - Prospects for the direct association with IceCube and KM3NeT
• High-energy neutrinos from FR0 radio-galaxies?
• EeV Astrophysical neutrinos from FSRQs?
• The Origin of the Multiwavelength Emission of PKS 0502+049
• IceCube Flavor Ratios with Identified Astrophysical Sources: Towards Improving New Physics Testability
• High-energy neutrinos from X-rays flares of blazars frequently observed by the Swift X-Ray Telescope
• A Two-Zone Model as origin of Hard TeV Spectrum in Extreme BL Lacs
• Constraining photohadronic scenarios for the unified origin of IceCube neutrinos and ultrahigh-energy cosmic rays
• TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources
• Neutrino Fluence from Gamma-Ray Bursts: Off-Axis View of Structured Jets
• Can BL Lac emission explain the neutrinos above 0.2 PeV?
• On radiative acceleration in spine-sheath structured blazar jets
• Repeated patterns of gamma-ray flares suggest structured jets of blazars as likely neutrino sources
• PeV-EeV neutrinos from gamma-ray blazars due to ultrahigh-energy cosmic-ray propagation
• Search for muon-neutrino emission from GeV and TeV gamma-ray flaring blazars using five years of data of the ANTARES telescope
• Repeated pattern of $\gamma$-ray flares in the blazar PKS 1502+106 coincident with the IC190730A neutrino event
• Gamma Rays From Blazars
• High-Energy Neutrino Fluxes from Hard-TeV BL Lacs
• Medium-band observation of the neutrino emitting blazar, TXS 0506+056
• On the radiation energy density in the jet of high-energy emitting BL Lac objects and its impact on their multi-messenger role
• Observing the inner parsec-scale region of candidate neutrino-emitting blazars
• Photopion Production in Black-Hole Jets and Flat-Spectrum Radio Quasars as PeV Neutrino Sources
• High-Energy Neutrinos from Blazar Flares and Implications of TXS 0506+056
• Convex X-ray Spectra of PKS 2155-304 and Constraints on the Minimum Electron Energy
• A new method for studying the blazar variability on the shortest time scales and its application to S5 1803+784
• TELAMON: Effelsberg Monitoring of AGN Jets with Very-High-Energy Astroparticle Emissions
• The dynamics of the parsec-scale jet in the neutrino blazar PKS 0735+178
• The blazar paradigm and its discontents
• Flat Spectrum Radio Quasars as high-energy neutrino sources
• Rapid jet ejection from PKS 0215+015 coincident with a high-energy neutrino event
• Selected results from IceCube
• Aspects of astrophysical particle production and beyond the Standard Model phenomenology