Galaxy formation meets Reionization in the THESAN simulations 

13 billion years ago, the radiation of the first galaxies transformed the Universe, ionizing the hydrogen between galaxies in a process called cosmic reionization. Despite their intimate connection, the formation of the first galaxies and the reionization process are typically studied separately. A team led by an MPA researcher has now produced the first suite of simulations that simultaneously capture these processes, as well as their connection, called THESAN.