Extragalactic Blazar Diffuse Population Interpretation for the KM3-230213A event

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00389245" target="_blank" >RIV/68407700:21670/25:00389245 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.22323/1.501.0986" target="_blank" >https://doi.org/10.22323/1.501.0986</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.22323/1.501.0986" target="_blank" >10.22323/1.501.0986</a>

Result language
angličtina
Original language name
Extragalactic Blazar Diffuse Population Interpretation for the KM3-230213A event
Original language description
On February 13, 2023, the KM3NeT/ARCA neutrino telescope detected an ultra-high-energy neutrino event, KM3-230213A, with an estimated energy in the hundreds of PeV range. In this study, we explore whether such a rare event can originate from a diffuse population of blazars. We simulate the neutrino and photon emission from blazar jets using the AM3 lepto-hadronic code, convolve the results with the Fermi-LAT blazar luminosity function, and evaluate the resulting diffuse flux. A likelihood analysis incorporating both KM3NeT and IceCube exposure data, as well as a gamma-ray background penalty from Fermi-LAT, allows us to constrain the parameter space of the baryonic loading and proton spectral index. We find that the KM3-230213A event could have been generated by a blazar diffuse flux, under physically motivated assumptions. This work demonstrates the strength of multi-messenger analyses and underlines the importance of joint neutrino observatory efforts in interpreting the high-energy sky.
Czech name
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Czech description
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Project
<a href="/en/project/LM2023063" target="_blank" >LM2023063: Laboratoire Souterrain de Modane – participation of the Czech Republic</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
39th International Cosmic Ray Conference (ICRC2025)
ISBN
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ISSN
1824-8039
e-ISSN
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Number of pages
10
Pages from-to
1-10
Publisher name
PoS - Proceedings of Science, Sissa Medialab srl
Place of publication
Trieste
Event location
Geneva
Event date
Jul 14, 2025
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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