Predicting the Neutrino Emission for the Sources in the H.E.S.S. Galactic Plane Survey

TL;DR

This paper predicts neutrino emissions from gamma-ray sources in the Milky Way based on observed spectra, providing a model to aid in neutrino detection and distinguish hadronic from leptonic origins.

Contribution

It introduces an observation-based, class-agnostic model for neutrino emission from Galactic gamma-ray sources, independent of source distance or environment.

Findings

Predicted neutrino fluxes for 78 gamma-ray sources.

Developed an empirical model for Galactic neutrino emission.

Facilitates targeted neutrino searches and source origin testing.

Abstract

The H.E.S.S. Galactic Plane Survey has detected very-high-energy (VHE) gamma-ray emission from 78 sources in the Milky Way. These sources belong to different object classes (pulsar wind nebulae, supernova remnants or binary systems) and some of these sources remain unidentified. The gamma-ray emission of these objects may be of leptonic or hadronic origin and gamma-ray observations alone cannot distinguish between these two scenarios. The detection of neutrino emission would provide evidence for a hadronic scenario in these objects. Based on the observed gamma-ray spectra we predict the neutrino emission of these sources under the hypothesis that the emission is solely of hadronic origin. This prediction relies entirely on observation and is independent of the source class, the distance or the ambient target material. We use these predictions to create an empirical model for the neutrino emission of the Milky Way. This model can be used to search for neutrino emission from individual gamma-ray sources as well as testing for neutrino emission from potential source populations in the Milky Way.