Discovery of a Dusty, Chemically Mature Companion to a z\sim4 Starburst Galaxy in JWST ERS Data

We report the discovery of two companion sources to a strongly lensed galaxy SPT0418-47 ("ring") at redshift 4.225, targeted by the JWST Early Release Science program. We confirm that these sources are at a similar redshift as the ring based on H\alpha detected in the NIRSpec spectrum, and [C II]... Show more