First galaxies, cosmic reionization and their interplay – successes and challenges of numerical models
Speaker: Enrico Garaldi (Kavli IPMU, U. Tokyo)
Abstract:
Within a decade, an array of observational facilities will deliver the first comprehensive picture of the reionizing Universe, from galaxies to the diffuse inter-galactic medium. Such leap forward in observational capabilities, already started with the launch of the James Webb Space Telescope, demands a comparable transformation in modeling techniques, that are currently lagging behind in accuracy. I will present ongoing efforts to build a solid theoretical framework to study this last frontier in structure formation. I will highlight current challenges in theoretical modeling and present a way forward to overcome them, to build the next state of the art in simulations of the first billion years of the Universe. Finally, I will show how new observations are enabling us to study the galaxy-IGM interplay during the tail end of reionization and place constraints on both galaxy formation and cosmic reionization models.