When Supernova Feedback Got Stronger, Early Galaxies Grew Too Big
A JWST-mimicking simulation finds stronger supernova feedback made early galaxies too diffuse, while richer physics produced bright, compact systems.
galaxy formation
A New Simulation Traces How Cosmic Rays Could Steady Early Galaxies
A new galaxy simulation links cosmic rays, bursty star formation and changing winds to explain how early galaxies may have grown.