https://ui.adsabs.harvard.edu/abs/2023arXiv230214155L
Looser et al. 2023

• A quiescent galaxy at z=7.3 (cosmic time 700 Myr). 
• The JWST/NIRSpec spectrum of this galaxy from our JADES program exhibits a complete absence of nebular emission lines, while the Balmer break and Lyα drop are unambiguously detected. 
• They infer a short and intense burst of star formation followed by rapid quenching, about 10–20 Myr before the epoch of observation.