Multimessenger emission from magnetic reconnection in blazar jets: the case of TXS 0506+056

de Gouveia Dal Pino, E.M.; Rodríguez-Ramírez, J.C.; del Valle, M.V.

doi:10.1093/mnras/staf251

Multimessenger emission from magnetic reconnection in blazar jets: the case of TXS 0506+056

Nov 15, 2024

14 pages

Published in:

Mon.Not.Roy.Astron.Soc. 537 (2025) 4, 3895-3907

Published: Feb 11, 2025

e-Print:

2411.10210 [astro-ph.HE]

DOI:

10.1093/mnras/staf251

View in:

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Abstract: (Oxford University Press)

Measurements from astroparticle experiments, such as the 2017 flare associated with the source TXS 0506+056, indicate that blazars act as multimessenger (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 (VHEs). 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 ∼2 to 4 pc from the central engine, which is a supermassive black hole of 3×108 M⊙ launching a jet with 150LEdd power. As the blob moves, we observe a sequence of spectral energy distribution 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-ray (⁠E∼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 ≃6.4 d, which is consistent with that observed in the 2017 MM flare.

Note:

14 pages, 7 figures, accepted for publication in MNRAS

acceleration of particles
magnetic reconnection
radiation mechanisms: non-thermal
turbulence
galaxies: active
galaxies: jets

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