ANTARES constraints on a Galactic component of the IceCube cosmic neutrino flux

TL;DR

This paper investigates the potential Galactic origin of IceCube's cosmic neutrinos by analyzing ANTARES constraints, exploring hypotheses of point sources and extended regions, and comparing expected fluxes with observational limits.

Contribution

It provides the first comprehensive analysis constraining Galactic neutrino flux hypotheses using ANTARES data, addressing the North/South asymmetry in IceCube observations.

Findings

ANTARES data constrains possible Galactic neutrino fluxes

Extended Galactic regions are less likely sources based on current limits

Point source hypotheses are partially constrained by ANTARES upper limits

Abstract

The IceCube evidence for cosmic neutrinos has inspired a large number of hypothesis on their origin, mainly due to the poor precision on the measurement of the direction of showering events. A North/South asymmetry in the present data set suggests the presence of a possible Galactic component. This could be originated either by single point-like sources or from an extended Galactic region. Expected fluxes derived from these hypotheses are presented. Some values have been constrained from the present available upper limits from the ANTARES neutrino telescope.