Radio-to-gamma-ray synchrotron and neutrino emission from proton-proton interactions in active galactic nuclei

Abstract

We explore possible physical origin of correlation between radio wave and very-high-energy neutrino emission in active galactic nuclei (AGN), suggested by recently reported evidence for correlation between neutrino arrival directions and positions of brightest radio-loud AGN. We show that such correlation is expected if both synchrotron emitting electrons and neutrinos originate from decays of charged pions produced in proton-proton interactions in parsec-scale relativistic jet propagating through circum-nuclear medium of the AGN.

arXiv comment6 pages, 1 figure, accepted to JETP Lett

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• Constraints on the models of the origin of high-energy astrophysical neutrinos
• High-energy neutrino-induced cascade from the direction of the flaring radio blazar TXS 0506+056 observed by Baikal-GVD in 2021
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• Near-future discovery of point sources of ultra-high-energy neutrinos
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• Hunting for neutrino emission from multi-frequency variable sources