KM3NeT collaboration proposes blazars as source of most energetic neutrino ever detected
Updated
Updated · SciTechDaily · Apr 24
KM3NeT collaboration proposes blazars as source of most energetic neutrino ever detected
12 articles · Updated · SciTechDaily · Apr 24
A neutrino with about 220 PeV energy was detected on February 13, 2023, by the KM3NeT/ARCA detector off Sicily, using only 21 active detection lines.
Researchers found no electromagnetic counterpart and, through simulations and cross-checks with IceCube and Fermi data, suggest a diffuse population of blazars could explain the event's extreme energy.
The study highlights the rarity of such ultra-high-energy neutrinos and underscores the need for more data from the still-under-construction KM3NeT, which could reshape understanding of cosmic particle acceleration.
Now more complete, has the KM3NeT detector captured any new clues from this mysterious source in the sky?
Could an exploding primordial black hole be the true source of 2023's record-breaking 'ghost particle'?
With its 2026 upgrade complete, what has the IceCube observatory found by re-examining its data for similar cosmic phantoms?
Does this particle's journey through Earth hint at new physics or forces beyond our current understanding?
Could this single particle provide the first experimental evidence for Stephen Hawking's theory of black hole radiation?
Unveiling the Universe’s Most Powerful Particle Accelerator: KM3NeT’s 220 PeV Neutrino and the Role of Blazars
Overview
On February 13, 2023, the KM3NeT ARCA telescope detected KM3-230213A, the highest-energy neutrino ever recorded at 220 PeV. This rare event, identified by a powerful muon signature, showed no electromagnetic counterpart, suggesting it originated from a diffuse cosmic source rather than a single burst. Statistical evidence and simulations point to blazars—active galaxies with jets accelerating protons—as the most likely sources, capable of producing such ultra-high-energy neutrinos without exceeding gamma-ray background limits. This discovery challenges existing cosmic acceleration models and highlights the importance of expanding neutrino observatories to better understand these extreme cosmic phenomena.