Speaker: Ellis Owen
Host: Nicolas Ledos
Title: Cosmic rays in halos and beyond: astroparticle physics in the large-scale structures of the Universe
Abstract: Cosmic rays interact with astrophysical systems across a vast range of scales, from turbulent galactic environments to the large-scale structure of the Universe. They go hand-in-hand with violent, energetic astrophysical environments, and are an active agent able to regulate the evolution and physical conditions of galactic and circum-galactic ecosystems. Depending on their energy, they can also escape from galaxies and propagate into the broader cosmic web. In this talk, I will explore the role of cosmic rays in galaxy halos, highlighting how they influence baryon circulation and shape galaxy evolution. I will also discuss the fate of cosmic rays that escape into the large-scale structure of the Universe, their interactions with magnetized environments in galaxy clusters and cosmic filaments, and the fate of distant high-energy cosmic rays that do not reach us on Earth.