Relatore
Antonio Capanema
(Pontifícia Universidade Católica do Rio de Janeiro)
Descrizione
It is well known that our Universe is opaque to high-energy gamma-rays due to electromagnetic cascades over cosmological distances, resulting in a spectrum of secondary gamma-rays at lower energies. In this talk, we will summarize the physics and features of such cascades and discuss their importance in the context of multimessenger astrophysics up to ultra-high energies. In particular, we demonstrate how one can infer properties of the IceCube neutrino sources from their corresponding cascaded gamma-ray counterparts. We also show how muon pair production can play an important role in the cascade development at high-redshifts, leading to the production of ultra-high energy neutrinos.
Autori principali
Sig.
AmirFarzan Esmaeili
(Pontifícia Universidade Católica do Rio de Janeiro)
Antonio Capanema
(Pontifícia Universidade Católica do Rio de Janeiro)
Arman Esmaili
(Pontifícia Universidade Católica do Rio de Janeiro)
Pasquale Dario Serpico
(CNRS, Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTh), France)
