In just a few months, JWST has revolutionized our understanding of the universe. Its unprecedented sensitivity and angular resolution have given us a new view of the cosmos, enabling new discoveries in many areas of astronomy. I will describe first results from my GLASS-JWST Early Release Science Program. The primary goal of the program is understanding how the first galaxies form, grow, and cause the last major phase transition of the universe, called "cosmic reionization". The second major goal of GLASS-JWST is understanding how how heavy elements such as Carbon and Oxygen were formed out of the pristine gas leftover from the Big Bang and dispersed into the cosmos. Highlights include: i) the discovery of an hitherto unknown population of luminous galaxies at z>10, indicating that galaxies formed earlier and faster than previously thought; ii) the discovery of strongly inverted metal gradients in low mass galaxies, unexpected in galaxies formation models. I will also describe a number of other discoveries and surprises, including a highly magnified star billions of light years away, a very cool brown dwarf, and a supernova at z>3.
Join from PC, Mac, Linux, iOS or Android: https://stanford.zoom.us/j/98973156241?pwd=cEU5RFdlVXoyc0JTeTlDMkozKzQ5UT09
Federico Bianchini, Yifan Chen
(fbianc@slac, cyifan@slac)
