Observation of high-energy neutrinos from the Galactic plane
Date
2023
Authors
Abbasi, R.
Ackermann, M.
Adams, J.
Aguilar, J.A.
Ahlers, M.
Ahrens, M.
Alameddine, J.M.
Alves, A.A.
Amin, N.M.
Andeen, K.
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Journal article
Citation
Science, 2023; 380(6652):1338-1343
Statement of Responsibility
IceCube Collaboration
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Abstract
The origin of high-energy cosmic rays, atomic nuclei that continuously impact Earth's atmosphere, is unknown. Because of deflection by interstellar magnetic fields, cosmic rays produced within the Milky Way arrive at Earth from random directions. However, cosmic rays interact with matter near their sources and during propagation, which produces high-energy neutrinos. We searched for neutrino emission using machine learning techniques applied to 10 years of data from the IceCube Neutrino Observatory. By comparing diffuse emission models to a background-only hypothesis, we identified neutrino emission from the Galactic plane at the 4.5σ level of significance. The signal is consistent with diffuse emission of neutrinos from the Milky Way but could also arise from a population of unresolved point sources.
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© 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. https://www.sciencemag.org/about/science-licenses-journal-article-reuse. This is an article distributed under the terms of the Science Journals Default License.