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

TL;DR

This paper investigates the connection between radio emissions and high-energy neutrinos in active galactic nuclei, proposing that both originate from proton-proton interactions in relativistic jets, explaining observed correlations.

Contribution

It presents a physical model linking radio synchrotron emission and neutrino production via proton-proton interactions in AGN jets, explaining recent observational correlations.

Findings

Correlation between radio and neutrino emissions is expected from proton-proton interactions.

Synchrotron electrons and neutrinos both originate from charged pion decays.

Model supports the observed association of neutrino events with radio-loud AGN.

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.