Concepts de base
Observing mini-quenched galaxies in the early Universe is crucial to understanding galaxy formation and transformation, providing insights into starburst episodes and rapid quenching.
Résumé
A bimodal distribution exists among local galaxies, with active star-forming and passive systems connected by those in transition. Early cosmic times saw stochastic star formation in low-mass systems, leading to mini-quenching events. Identifying a mini-quenched galaxy at z=7.3, only 700 million years after the Big Bang, sheds light on feedback mechanisms affecting temporary quenching.
Stats
The JWST/NIRSpec spectrum of the galaxy is very blue (UV =0.16 ± 0.03 mag).
The stellar mass of the galaxy falls in the range of 4-6×108 M⊙.