Blazars as a potential origin of the KM3-230213A event

Journal of Cosmology and Astroparticle Physics 2026 Open access

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Authors: O. Adriani, A. Albert, A.R. Alhebsi, S. Alshalloudi, S. Alves Garre, A. Ambrosone, F. Ameli, M. Andre, L. Aphecetche, M. Ardid, S. Ardid, J. Aublin
+88 more F. Badaracco, L. Bailly-Salins, B. Baret, A. Bariego-Quintana, M. Barnard, Y. Becherini, M. Bendahman, F. Benfenati Gualandi, M. Benhassi, D.M. Benoit, Z. Beňušová, E. Berbee, C. van Bergen, E. Berti, V. Bertin, P. Betti, S. Biagi, M. Boettcher, D. Bonanno, M. Bondì, S. Bottai, A.B. Bouasla, J. Boumaaza, M. Bouta, M. Bouwhuis, C. Bozza, R.M. Bozza, H. Brânzaş, F. Bretaudeau, M. Breuhaus, R. Bruijn, J. Brunner, R. Bruno, E. Buis, R. Buompane, I. Burriel, J. Busto, B. Caiffi, D. Calvo, A. Capone, F. Carenini, V. Carretero, T. Cartraud, P. Castaldi, V. Cecchini, S. Celli, L. Cerisy, M. Chabab, N. Chau, A. Chen, S. Cherubini, T. Chiarusi, W. Chung, M. Circella, R. Clark, R. Cocimano, J.A.B. Coelho, A. Coleiro, A. Condorelli, R. Coniglione, P. Coyle, A. Creusot, G. Cuttone, R. Dallier, A. De Benedittis, X. de La Bernardie, G. De Wasseige, V. Decoene, P. Deguire, I. Del Rosso, L.S. Di Mauro, I. Di Palma, A.F. Díaz, D. Diego-Tortosa, C. Distefano, A. Domi, C. Donzaud, D. Dornic, E. Drakopoulou, D. Drouhin, J.-G. Ducoin, P. Duverne, R. Dvornický, T. Eberl, E. Eckerová, A. Eddymaoui, T. van Eeden, M. Eff
DOI: 10.1088/1475-7516/2026/03/033
Cited by: 3
References: 33

Abstract

Abstract The KM3NeT collaboration has reported the detection of the highest energy neutrino event observed to date. The energy of the event is of the order of 220 PeV hinting towards a neutrino flux at the highest energies. In this article, the potential blazar origin for this event is explored. The publicly available Astro-Multimessenger Modeling software is used to model the blazar gamma-ray and neutrino fluxes. It is concluded that a population of blazars could produce the diffuse flux compatible with the observation of the ultra-high energy event detected by the KM3NeT/ARCA detector. At the same time, the gamma-ray flux produced by such a population of blazars is consistent with the diffuse gamma-ray flux measured by the Fermi Large Area Telescope.

Fields of Study & Subjects

Astrophysics and Cosmic Phenomena Neutrino Physics Research Radioactive Decay and Measurement Techniques

Publication details

Journal / source
Journal of Cosmology and Astroparticle Physics
Publisher
IOP Publishing
Volume
2026
Issue
03
Pages
033–033
Publication date
1 March 2026
Language
EN