Jul 12 – 23, 2021
Europe/Berlin timezone

High-energy neutrino emission from blazars

Jul 16, 2021, 3:00 PM


Talk MM | Multi-Messenger Plenary


Foteini Oikonomou (NTNU)


Active galactic nuclei (AGN) with relativistic jets are the most
powerful persistent astrophysical sources of electromagnetic radiation
in the Universe. Blazars are the most extreme subclass of AGN with
jets directed along our line of sight and emission relativistically
beamed in our direction. Their high-energy photon emission dominates
the extragalactic gamma-ray sky and reaches multi-TeV energies. This
demonstrates that they accelerate electrons to very high energies. It
has long been suspected that blazars may also accelerate protons to
very high energies and thus be cosmic neutrino sources. Being
extremely rare objects in addition to being bright, blazars are among
the most readily testable neutrino candidate source classes.

A number of multi-messenger monitoring campaigns have recently been
triggered in response to high-energy neutrinos observed with the
IceCube Neutrino Observatory from the direction of blazars. In this
talk, I will discuss the theoretical interpretation of these
observations and give an overview of the possible role of blazars as
neutrino sources in light of the experimental results. Finally, I will
discuss the prospects of confirming blazars as high-energy hadron
accelerators with future neutrino observations based on theoretical


blazars; high-energy neutrinos; leptohadronic modelling

Subcategory Theoretical Results

Primary author


Maria Petropoulou Petropoulou (Princeton University) Kohta Murase (Penn State University)

Presentation materials