Speaker
Description
Ultra High-Energy Cosmic Rays (UHECRs) are expected to interact extensively with the
cosmic microwave background (CMB) and the extragalactic background light (EBL),
generating secondary particles such as gamma rays and neutrinos. These secondary
particles create a guaranteed diffuse background of photons in the GeV-TeV energy
range and neutrinos in the PeV-EeV range. Notably, while UHECRs above 10$^{19}$ eV are
confined to the local Universe, their neutrino and gamma-ray counterparts provide a
window into the cosmological evolution of cosmic ray sources.
Developing a coherent framework to scrutinize the production and propagation of these
secondary diffuse emissions induced by UHECRs is therefore essential.
In this presentation, we introduce a novel public code, GammaProp, designed for integration with SimProp, a widely used UHECR propagation code. After validating our
framework against the latest UHECR spectrum measurements, we use it to interpret
current limits and provide forecasts for future observations. This is particularly signifi-
cant in light of the upcoming multi-messenger observations by AugerPrime, which will
offer unique insights to constrain the luminosity of UHECR sources and their evolution
over cosmic time.
