Journal Article

PUBDB-2025-01901

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Can the neutrinos from TXS 0506+056 have a coronal origin?

Fiorillo, D. F. G. (Corresponding author)Extern* ; Testagrossa, F.DESY* ; Petropoulou, M. ; Winter, W.DESY*

2025
Institute of Physics Publ. London

This record in other databases:    

Please use a persistent id in citations: doi:10.3847/1538-4357/add267  doi:10.3204/PUBDB-2025-01901

Report No.: arXiv:2502.01738

Abstract: 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.

Note: 7 pages, 2 figures, plus appendices

---

Contributing Institute(s):

1. Theoretische Astroteilchenphysik (Z_THAT)

Research Program(s):

1. 613 - Matter and Radiation from the Universe (POF4-613) (POF4-613)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

---

Database coverage:
; ; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; Fees ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Fiorillo, D. F. G. (Corresponding author)Extern*DESY* ; Testagrossa, F.DESY* ; Petropoulou, M. ; Winter, W.DESY*
Can the neutrinos from TXS 0506+056 have a coronal origin?
    Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

---