Search for Extended Sources of Neutrino Emission in the Galactic Plane with IceCube
(2023) Astrophysical Journal — Vol. 956 (2023)
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- Authors
Lamoureux, Mathieu 
- et. al.
- Abstract
- The Galactic plane, harboring a diffuse neutrino flux, is a particularly interesting target in which to study potential cosmic-ray acceleration sites. Recent gamma-ray observations by HAWC and LHAASO have presented evidence for multiple Galactic sources that exhibit a spatially extended morphology and have energy spectra continuing beyond 100 TeV. A fraction of such emission could be produced by interactions of accelerated hadronic cosmic rays, resulting in an excess of high-energy neutrinos clustered near these regions. Using 10 years of IceCube data comprising track-like events that originate from charged-current muon neutrino interactions, we perform a dedicated search for extended neutrino sources in the Galaxy. We find no evidence for time-integrated neutrino emission from the potential extended sources studied in the Galactic plane. The most significant location, at 2.6σ post-trials, is a 1.°7 sized region coincident with the unidentified TeV gamma-ray source 3HWC J1951+266. We provide strong constraints on hadronic emission from several regions in the galaxy.
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Citations
de Wasseige, G., Kruiswijk, K., Lamoureux, M., Raab, C., Vereecken, M., IceCube, & et al. (2023). Search for Extended Sources of Neutrino Emission in the Galactic Plane with IceCube. Astrophysical Journal, 956. https://doi.org/10.3847/1538-4357/acf713 (Original work published 2023)