An EAGLE view of the missing baryons.

A significant fraction of the predicted baryons remains undetected in the local Universe. To aid in the search of the missing baryons, we turned to the state-of-the-art hydrodynamical EAGLE simulation. I will present the spatial and thermal distributions of the simulated baryons within the filaments of the Cosmic Web. In particular, I will characterise the properties of the hot phase (log T(K) > 5.5) of the Warm-Hot Intergalactic Medium (WHIM). As observations of the diffuse intergalactic medium at these temperatures are extremely challenging, the hot WHIM remains largely undetected and is a candidate to solve the cosmological missing baryons problem. Indeed, the EAGLE simulation predicts a large fraction of baryons to be in this phase: while the filaments occupy only ≈ 5% of the full simulation volume, the diffuse hot intergalactic medium in filaments amounts to ≈ 23% − 25% of the total baryon budget. I will demonstrate how we located the simulated hot WHIM and examined its radial temperature and density profiles by using the Bisous and MMF/NEXUS+ filament finders, and show how the galaxy luminosity density can aid in selecting the most promising filaments for future observations.