Simulating the Diffuse Neutrino Emission from the Milky Way with GALPROP

TL;DR

This paper models the diffuse neutrino and gamma-ray emissions from the Milky Way using GALPROP, providing predictions consistent with current IceCube and LHAASO data, aiding future neutrino search efforts.

Contribution

It develops realistic GALPROP-based models for Galactic neutrino and gamma-ray emissions, offering state-of-the-art predictions for VHE neutrino signals.

Findings

Models are consistent with IceCube neutrino data within uncertainties.

Models align with LHAASO gamma-ray observations considering point source contamination.

Provides predictions for future neutrino detection efforts.

Abstract

We use the GALPROP cosmic ray (CR) propagation framework to model the diffuse neutrino and gamma-ray emissions from the Galaxy. A collection of realistic bounding models are developed and predictions of the resulting neutrino and gamma-ray signals are compared to the IceCube and LHAASO data up to PeV energies. We find that all the GALPROP models are consistent with the neutrino data within uncertainties. They are also consistent with expectations of neutrino emissions derived from LHAASO data when accounting for possible gamma-ray point source contamination. The new models present state-of-the-art predictions for the VHE neutrino emissions from the Galaxy that may be used for future neutrino searches.