Multi-messenger emission from magnetic reconnection in blazar jets: the case of TXS 0506+056

Abstract

Measurements from astroparticle experiments, such as the 2017 flare associated with the source TXS 0506+056, indicate that blazars act as multi-messenger (MM; radiation and neutrinos) factories. Theoretically, the particle acceleration mechanisms responsible for blazar emissions and the precise location within the jet where this occurs remain undetermined. This paper explores MM emission driven by magnetic reconnection in a blazar jet. Previous studies have shown that reconnection in the magnetically dominated regions of these relativistic jets can efficiently accelerate particles to very high energies (VHE). Assuming that turbulent-driven magnetic reconnection accelerates cosmic-ray protons and electrons by a Fermi process, we developed a lepto-hadronic radiation model without the influence of external soft-photons to explain the 2017 MM flare from TXS 0506+056. In the proposed scenario, the emission blob moves downstream in the jet from $\sim$2 to 4 pc from the central engine, which is a supermassive black hole (SMBH) of $3\times 10^8$ M${}_{\odot }$ launching a jet with $150L_{\mathrm{Edd}}$ power. As the blob moves, we observe a sequence of spectral energy distribution (SED) profiles that match the observed arrival of the high energy neutrino and electromagnetic emission from TXS 0506+056. This arrival coincides with the high state of intermediate energy $\gamma$-rays ($E\sim 1$ GeV) detection, followed by the subsequent appearance of the VHE $\gamma$-ray signal and then no further significant neutrino detection. We obtain a time delay between the neutrino and VHE events $\simeq 6.4$ days, which is consistent with that observed in the 2017 MM flare.

14 pages, 7 figures, accepted for publication in MNRAS

References in corpus (22)

• Fast TeV variability in blazars: jets in a jet
• Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxies
• Numerical Tests of Fast Reconnection in Weakly Stochastic Magnetic Fields
• Energy spectra of gamma-rays, electrons and neutrinos produced at interactions of relativistic protons with low energy radiation
• MOJAVE. XVII. Jet Kinematics and Parent Population Properties of Relativistically Beamed Radio-Loud Blazars
• Why does steady-state magnetic reconnection have a maximum local rate of order 0.1?
• TXS 0506+056, the first cosmic neutrino source, is not a BL Lac
• Blazar flares powered by plasmoids in relativistic reconnection
• Particle acceleration in the driven relativistic reconnection
• Hadronic models of blazars require a change of the accretion paradigm
• Gammapy: A Python package for gamma-ray astronomy
• Recent Progress on Particle Acceleration and Reconnection Physics during Magnetic Reconnectionin the Magnetically-dominated Relativistic Regime
• Beginning a journey across the universe: the discovery of extragalactic neutrino factories
• Determining the Dominant Acceleration Mechanism during Relativistic Magnetic Reconnection in Large-scale Systems
• A Neutral Beam Model for High-Energy Neutrino Emission from the Blazar TXS 0506+056
• Properties of the First-order Fermi acceleration in fast magnetic reconnection driven by turbulence in collisional MHD flows
• A magnetic reconnection model for explaining the multi-wavelength emission of the microquasars Cyg X-1 and Cyg X-3
• Proton Synchrotron $\gamma$-rays and the Energy Crisis in Blazars
• Correlating high-energy IceCube neutrinos with 5BZCAT blazars and RFC sources
• Search for Astrophysical Neutrinos from 1FLE Blazars with IceCube
• VHE Emission from Magnetic Reconnection in the RIAF of SgrA*
• Magnetic reconnection, plasmoids and numerical resolution

Cited by in corpus (2)

• Zooming into the neutrino-associated blazar candidate J1718+4239
• TeV gamma-ray spectral spikes produced by magnetic reconnection in blazar jets: the case of the 2014 high state of Markarian 501