Scientists develop the largest, most detailed model of the early universe to date

Amazing stuff!

"... Then, within a couple hundred million years after the Big Bang, the universe woke up, as gravity gathered matter into the first stars and galaxies. Light from these first stars turned the surrounding gas into a hot, ionized plasma — a crucial transformation known as cosmic reionization that propelled the universe into the complex structure that we see today. ...
With Thesan, the researchers can simulate a cubic volume of the universe spanning 300 million light years across. They run the simulation forward in time to track the first appearance and evolution of hundreds of thousands of galaxies within this space, beginning around 400,000 years after the Big Bang, and through the first billion years. ...
They then evolved these conditions forward in time to simulate a patch of the universe, using the SuperMUC-NG machine — one of the largest supercomputers in the world — which simultaneously harnessed 60,000 computing cores to carry out Thesan’s calculations over an equivalent of 30 million CPU hours"

From the abstract:

"The visibility of high-redshift Lyman-alpha emitting galaxies (LAEs) provides important constraints on galaxy formation processes and the Epoch of Reionization (EoR). However, predicting realistic and representative statistics for comparison with observations represents a significant challenge in the context of large-volume cosmological simulations. The THESAN project offers a unique framework for addressing such limitations by combining state-of-the-art galaxy formation (IllustrisTNG) and dust models with the AREPO-RT radiation-magneto-hydrodynamics solver. ..."

Scientists develop the largest, most detailed model of the early universe to date | MIT News | Massachusetts Institute of Technology Named after a goddess of the dawn, the Thesan simulation of the first billion years helps explain how radiation shaped the early universe.

The THESAN project: Lyman-α emission and transmission during the Epoch of Reionization (no public access)