Neutrinos in IceCube from AGN's

TL;DR

This paper models neutrino production in Active Galactic Nuclei (AGN) to explain IceCube's observed astrophysical neutrino flux, demonstrating consistency with gamma-ray and cosmic ray constraints.

Contribution

It introduces a model of neutrino creation in AGNs via photopion production on accretion disk radiation, aligning with IceCube data and observational constraints.

Findings

Model explains the observed neutrino flux from IceCube.

Photopion production in AGNs can account for neutrino observations.

Model remains consistent with gamma-ray and cosmic ray limits.

Abstract

Recently IceCube collaboration has reported first evidence for the astrophysical neutrinos. Observation corresponds to the total astrophysical neutrino flux of the order of $3 \cdot 10^{-8}$ $GeV/cm^2/s/sr$ in a PeV energy range. Active Galactic Nuclei (AGN) are natural candidate sources for such neutrinos. To model the neutrino creation in AGNs we study photopion production processes on the radiation field of the Shakura-Sunyaev accretion disks in the black hole vicinity. We show that this model can explain detected neutrino flux and avoids, at the same time, existing constraints from the gamma-ray and cosmic ray observations.