Exploring the High-Energy Neutrino Universe with IceCube

by Angela Zegarelli (Ruhr-Universität Bochum)

Monday 27 Apr 2026, 14:30 → 16:00 Europe/Rome

Aula Conversi (Dip. di Fisica - Edificio G. Marconi)

The IceCube Neutrino Observatory is a cubic-kilometer neutrino detector installed in the Antarctic ice at the South Pole, designed to detect neutrinos over a broad energy range, from GeV to PeV. In this talk, I will review the broad IceCube science program, focusing in particular on high-energy astrophysical neutrino observations. More than a decade after the discovery of a diffuse flux of high-energy neutrinos (TeV–PeV), new results are beginning to shed light on its origin. They point to contributions from some extragalactic sources, as well as from our Galaxy with increasing significance, although a substantial fraction of the flux remains unexplained and its origin remains an open question. I will also discuss current efforts to identify the sources of these high-energy neutrinos within a multimessenger framework, combining neutrino observations with gamma-ray and other electromagnetic data, with a focus on the IceCube real-time program.

IceCube_SeminarINFN_Rome_Zegarelli.pdf