Search for Extended Sources of Neutrino Emission in the Galactic Plane with IceCube
Creators: name: Abbasi, R.
name: Ackermann, M.
name: Adams, J.
name: Agarwalla, S. K.
name: Aguilar, J. A.
name: Ahlers, M.
name: Alameddine, J. M.
name: Amin, N. M.
name: Andeen, K.
name: Anton, G.
name: Argüelles, C.
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name: Athanasiadou, S.
name: Axani, S. N.
name: Bai, X.
name: V., A. Balagopal
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name: Basu, V.
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name: Meneguolo, C. Boscolo
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name: Deoskar, K.
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name: de Vries, K. D.
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name: Yanez, J. P.
name: Yildizci, E.
name: Yoshida, S.
name: Young, R.
name: Yu, F.
name: Yu, S.
name: Yuan, T.
name: Zhang, Z.
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Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The Galactic plane, harboring a diffuse neutrino flux, is a particularly interesting target 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 2.6$σ$ post-trials, is a 1.7$^\circ$ 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.
description: 13 pages, 4 figures, 5 tables including an appendix. Accepted for publication in Astrophysical Journal