Powerful simulations reveal how the first stars changed the universe

Ultra-detailed simulations are showing how the first stars lit up the dark Universe and seeded space with elements such as carbon, oxygen, and iron. The MEGATRON project could bridge JWST observations of the earliest galaxies with chemical clues preserved in ancient stars today. Powerful simulations reveal how the first stars changed the universe.

Powerful simulations reveal how the first stars changed the universe Science News from research organizations Powerful simulations reveal how the first stars changed the universe Powerful new simulations are recreating how the first stars lit up the Universe and forged the elements that eventually made planets and life possible. As stars live and die, they produce oxygen (yellow) and photons (white), all self-consistently evolved and tracked together by the new Megatron simulations. Rey Researchers are using extraordinarily detailed computer simulations to reconstruct one of the most transformative periods in cosmic history: the era when the first stars and galaxies began to emerge.

The work is part of the MEGATRON project, led by researchers at the University of Bath in the UK with collaborators at the University of Chicago in the US and the Institut d’Astrophysique de Paris in France. The project aims to explore how the earliest stars and galaxies illuminated a previously dark Universe and began producing and dispersing the chemical elements that later became essential ingredients of planets, life, and the world around us. Four studies from MEGATRON, published in the Open Journal of Astrophysics, combine advanced cosmological simulations with detailed models of radiation, chemistry and galaxy formation.

Together, they represent the collaboration’s first major collection of published results, with additional studies expected in the future.