On the Potential Galactic Origin of the Ultra-high-energy Event KM3-230213A
Abstract The KM3NeT observatory detected the most energetic neutrino candidate ever observed, with an energy between 72 PeV and 2.6 EeV at the 90% confidence level. The observed neutrino is likely of cosmic origin. In this article, it is investigated if the neutrino could have been produced within the Milky Way. Considering the low fluxes of the Galactic diffuse emission at these energies, the lack of a nearby potential Galactic particle accelerator in the direction of the event, and the difficulty of accelerating particles to such high energies in Galactic systems, we conclude that if the event is indeed cosmic, it is most likely of extragalactic origin.
Authors
- S. Alves Garre (ORCID: https://orcid.org/0000-0003-1893-0858)
- A. B. Bouasla
- Francesca Gualandi (ORCID: https://orcid.org/0000-0003-0859-7211)
- Sharif El Mentawi
- L.S Di Mauro
- David M. Benoit (ORCID: https://orcid.org/0000-0002-7773-6863)
- J. A. B. Coelho (ORCID: https://orcid.org/0000-0001-5615-3899)
- R. M. Bozza
- A. F. Díaz (ORCID: https://orcid.org/0000-0002-2615-6586)
- I. El Bojaddaini
- A.R Alhebsi
Institutions
- Badji Mokhtar-Annaba University (DZ)
- Cadi Ayyad University (MA)
- Mohammed V University (MA)
- University of Salerno (IT)
- Universidad de Granada (ES)
- Khalifa University of Science and Technology (AE)
- Friedrich-Alexander-Universität Erlangen-Nürnberg (DE)
- University of Hull (GB)
- University of the Witwatersrand (ZA)
- École Nationale Supérieure d'Ingénieurs de Caen (FR)
- National Centre of Scientific Research "Demokritos" (GR)
- Université Paris Cité (FR)
- Aix-Marseille Université (FR)
- North-West University (ZA)
- Université de Haute-Alsace (FR)
- Laboratoire AstroParticule et Cosmologie (FR)
- Institut Pluridisciplinaire Hubert Curien (FR)
- University of Catania (IT)
- National Institute for Subatomic Physics (NL)
- Centre de physique des particules de Marseille (FR)
- Instituto de Física Corpuscular (ES)
- Mohamed I University (MA)
- Laboratoire de Physique Subatomique et des Technologies Associées (FR)
- Laboratoire de Physique Corpusculaire de Caen (FR)
- IMT Atlantique (FR)
- Azienda Ospedaliera Universitaria Università degli Studi della Campania Luigi Vanvitelli (IT)
- Czech Technical University in Prague (CZ)
- University of Florence (IT)
- Universitat Politècnica de València (ES)
- Université de Strasbourg (FR)
- University of Naples Federico II (IT)
- Comenius University Bratislava (SK)
- University of Genoa (IT)
- Sapienza University of Rome (IT)
- University of Amsterdam (NL)
- University of Bologna (IT)
- Universitat Politècnica de Catalunya (ES)
- Nantes Université (FR)
Publication Details
- Journal
- The Astrophysical Journal
- Published
- 2026-05-22
- DOI
- https://doi.org/10.3847/1538-4357/ade3b0
- Citations
- 1
- Primary Topic
- Astrophysics and Cosmic Phenomena
- Type
- preprint
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation
- Belgian American Educational Foundation
- Arab Fund for Economic and Social Development
- European Commission
- Agence Nationale de la Recherche
- Grantová Agentura České Republiky
- Fundacja na rzecz Nauki Polskiej
- Fonds De La Recherche Scientifique - FNRS
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek
- Generalitat Valenciana
- Conseil Régional, Île-de-France
- Khalifa University of Science, Technology and Research
- Centre National de la Recherche Scientifique
- Shota Rustaveli National Science Foundation
- Agentúra na Podporu Výskumu a Vývoja
- Istituto Nazionale di Fisica Nucleare
- Région Normandie
- ESI Group
- Ministero dell'Università e della Ricerca
- HORIZON EUROPE Framework Programme
- European Regional Development Fund
- Agencia Estatal de Investigación
- Labex UnivEarthS
- Institut National de Physique Nucléaire et de Physique des Particules