JWST detects six different metal types in galaxies at redshift 9

James Webb Space Telescope/NIRSpec rest-frame ultraviolet spectroscopy has revealed six different metal types, Oxygen, Silicon, and Carbon in both neutral and ionized states, in galaxies at redshift 9, a period just several hundred million years after the Big Bang. The SPURS program detected blueshifted metal absorption with velocity offsets of approximately 50-250 km s −1, indicating these metals are actively moving out of these early galaxies and suggesting rapid chemical processing. These results demonstrate key conditions for baryon cycling were established in luminous galaxies within the first several hundred million years of cosmic time, well before the completion of reionization. Recent spectroscopic analysis using the James Webb Space Telescope's NIRSpec…