|
The recent commissioning JWST has opened a new window to the high-redshift Universe. In particular, NIRCam and NIRSpec provide imaging and spectroscopy of the rest-frame optical of early galaxies with unprecedented depth and resolution, affording new insights into the properties of stellar populations and interstellar medium (ISM) at early cosmic times. The JWST Advanced Deep Extragalactic Survey (JADES) is a large GTO program executed across JWST Cycles 1 and 2, comprising over 600 hours of deep NIRCam imaging and NIRSpec multi-object spectroscopy. This survey will assemble a large near-infrared dataset with enormous legacy value for studying galaxies from cosmic noon out to the highest redshifts. In this talk, I will present early results from JADES focusing on galaxies in the epoch of reionisation (z>6). With this dataset we can probe the ISM conditions of these galaxies, including metallicity, temperature and ionisation state, finding a large variety of conditions in these galaxies. Combined with analysis of the stellar populations and star-formation histories, these findings suggest that these galaxies are experiencing rapid evolution dominated by bursty star formation. n addition to results from samples of typical galaxies at these redshifts, I will also discuss results from some of the most extreme outliers, and some of the insights gained from these into the conditions of early star formation. |
|