Speaker
Description
The advent of JWST has allowed us to peer further into the Universe than we've ever been able to before. With over 20 galaxies observed beyond redshift 10, we are now able to observe the formation of galaxies at a time where we still expect the formation of population III (Pop III) stars. In this talk, I will introduce the MEGATRON simulation and its prescription for the formation of individual Pop III stars. MEGATRON features a comprehensive out-of-equilibrium chemistry network coupled to on-the-fly radiation transfer, allowing us to track and resolve the chemical enrichment from stellar feedback. We show the transition of initial Pop III formation in filamentary structures to forming further and further away as the volume quickly enriches. We also compute spectra for all galaxies forming Pop III stars and show that even for galaxies with large bursts of Pop III formation, their observational signatures are too dim to be observed with JWST. The Pop III stars are tracked through particle tagging to z=0, and we show that a significant number of Pop III stellar remnants reside in sub halos.
