Propagation of Ultra High-Energy Cosmic Rays in light of the latest EBL constraints
Résumé
Recent progress in measurements and modeling of the Extragalactic Background Light (EBL) has placed considerable constraints on its spectral density. These constraints are particularly relevant for the propagation of Ultra-High Energy Cosmic Rays (UHECRs), as in the past the EBL uncertainties have significantly impacted the result of simulations that aim at inferring source properties from the observed UHECR spectral and composition data. In this contribution, we show that the reduction in EBL uncertainties recently achieved makes their impact on the propagation of UHECRs subdominant.