24-26 June 2025
National Research Nuclear University MEPhI
Europe/Moscow timezone

The blazar origin of the KM3-230213A ultra high energy neutrino event

Not scheduled
15m
National Research Nuclear University MEPhI

National Research Nuclear University MEPhI

Kashirskoe shosse 31, Moscow, Russian Federation, 115409
Original Talk Cosmic rays (nuclei, gammas, neutrinos) of very high energies (> 100 TeV) Cosmic rays (nuclei, gammas, neutrinos) of very high energies (> 100 TeV)

Speaker

Timur Dzhatdoev

Description

The source of the remarkable ultra high energy neutrino event KM3-230213A detected with the KM3-ARCA array is still not established. A persistent isotropic source hypothesis is disfavored due to the non-observation of a similar event by the larger IceCube detector that benefits from $\sim$ an order-of-magnitude larger observation time compared to the KM3-ARCA array as well.

We consider two possible sources of the KM3-230213A event, namely, the blazars PKS 0605-085 and MRC 0614-083. PKS 0605-085 is a powerful flat-spectrum radio quasar (FSRQ) at the redshift z = 0.87 located at 2.4$^{\circ}$ from the reconstructed direction of the KM3-230213A event. In particular, we consider a scenario where the neutrino is produced on the external photon field provided by the outer layer (the “sheath”) of the “spine-sheath” jet structure. In this case, the blazar PKS 0605-085 appears to be among the most probable sources of the KM3-230213A event.

The blazar MRC 0614-083 is located at 0.6$^{\circ}$ from the reconstructed direction of the KM3-230213A event. We consider a hypothesis that MRC 0614-083 is actually an extreme TeV blazar. In this case, MRC 0614-083 is a viable candidate source of the KM3-230213A event.

Primary author

Presentation Materials

There are no materials yet.