%0 Journal Article
%A Fiorillo, Damiano Francesco Giuseppe
%A Testagrossa, Federico
%A Petropoulou, Maria
%A Winter, Walter
%T Can the neutrinos from TXS 0506+056 have a coronal origin?
%J The astrophysical journal / Part 1
%V 986
%N arXiv:2502.01738
%@ 0004-637X
%C London
%I Institute of Physics Publ.
%M PUBDB-2025-01901
%M arXiv:2502.01738
%P 104
%D 2025
%Z 7 pages, 2 figures, plus appendices
%X The blazar TXS 0506+056 has been the first astrophysical source associated with high-energy astrophysical neutrinos, and it has emerged as the second-most-prominent hotspot in the neutrino sky over ten years of observations. Although neutrino production in blazars has traditionally been attributed to processes in the powerful relativistic jet, the observation of a significant neutrino flux from NGC 1068 - presumably coming from the Active Galactic Nucleus (AGN) corona - suggests that neutrinos can also be produced in the cores of AGN. This raises the question whether neutrino production in TXS 0506+056 is also associated with the core region. We study this scenario, focusing on the hypothesis that this blazar is a masquerading BL Lac, a high-excitation quasar with hidden broad emission lines and a standard accretion disk. We show that magnetic reconnection is an acceleration process necessary to reach tens of PeV proton energies, and we use observationally motivated estimates of the X-ray luminosity of the coronal region to predict the emission of secondaries and compare them to the observed multi-wavelength and neutrino spectra of the source. We find that the coronal neutrino emission from TXS 0506+056 is too low to describe the IceCube observed neutrinos from this AGN, which in turn suggests that the blazar jet remains the preferred location for neutrino production.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.3847/1538-4357/add267
%U https://bib-pubdb1.desy.de/record/630941