Blazars as a Potential Origin of the KM3-230213A Event

TL;DR

This paper investigates whether blazars could be the source of the highest energy neutrino event detected by KM3NeT, using modeling to compare predicted fluxes with observations.

Contribution

It demonstrates that a population of blazars can produce the observed ultra-high energy neutrino flux while remaining consistent with gamma-ray measurements.

Findings

Blazar populations can account for the diffuse ultra-high energy neutrino flux.

The gamma-ray flux from blazars aligns with Fermi-LAT measurements.

Blazars are a plausible source for the KM3NeT neutrino event.

Abstract

The KM3NeT collaboration has reported the detection of the highest energy neutrino event observed to date. The energy of the event is of the order of 220 PeV hinting towards a neutrino flux at the highest energies. In this article, the potential blazar origin for this event is explored. The publicly available Astro-Multimessenger Modeling software is used to model the blazar gamma-ray and neutrino fluxes. It is concluded that a population of blazars could produce the diffuse flux compatible with the observation of the ultra-high energy event detected by the KM3NeT/ARCA detector. At the same time, the gamma-ray flux produced by such a population of blazars is consistent with the diffuse gamma-ray flux measured by the Fermi Large Area Telescope.