Orateur
Jonathan Biteau
({UNIV PARIS-SACLAY}UMR9012)
Description
The extragalactic sky at the highest energies is shaped by the complex interplay between relativistic messengers and the diffuse electromagnetic fields through which they propagate. Grounded in multi-messenger frameworks and empirical models of cosmic-ray transport, this talk provides a comprehensive synthesis of very-high-energy gamma-ray and ultra-high-energy cosmic-ray propagation across cosmological distances, including the production of cosmogenic neutrinos.