NBIA Seminar: Damiano Fiorillo

Starburst galaxies are expected to confine cosmic-rays via hadronic collisions, producing neutrinos and gamma-rays in the process. We review the observational properties of this production. First, we focus on individual starburst galaxies, assessing the most promising candidates that could be detected by future neutrino telescopes as point sources. We proceed to determine the diffuse neutrino and gamma-ray flux. We do not rely on the prototype-based approach, with all starburst galaxies having the same spectral shape, using instead a data-driven approach to model the variability among different galaxies. We propose a multi-component scenario in which starburst galaxies can account for up to 40% of the IceCube High-Energy Starting Events, thus alleviating the stringent constraints from previous literature.