Date Apr 16, 2025, 2:00 pm – 3:00 pm Location Jadwin Hall, PCTS (Room 407) Audience Faculty, post docs, grads Share on X Share on Facebook Share on LinkedIn Details Event Description Abstract: Study of the most distant galaxies using the James Webb Space Telescope has continued to push the discovery of galaxies to a time less than 300 million years after the Big Bang (redshift=14.2). The population of galaxies seen at these early epochs have properties that differ from expectations such as being generally more luminous and also having larger amounts of heavy elements such as oxygen. These surveys have found no definitive proof of "Population III" stars, the first stars to form after the Big Bang with composition reflective of the H/He dominated gas from the Big Bang. Other results include finding a surprising number of z>9 galaxies with Lyman-alpha emission.