JWST EXCELS

The EXtragalactic Continuum and Emission Line Science survey is a JWST Cycle 2 spectroscopic program (ID: 3543, PI: A. C. Carnall, F. Cullen) targeted ~350 star-forming and quiescent galaxies with the JWST/NIRSpec medium resolution gratings, with the aim of obtaining deep spectra. Science goals included the formation and quenching mechanisms of quiescent galaxies, and the nebular, chemical, and ionizing properties of star-forming galaxies.

Click the figure below to be redirected to the survey paper (Carnall et al. 2024)

Figure 1. An example star-forming galaxy at z = 5.2 from the EXCELS sample. An emission-line model is shown over the spectral data. Figure taken from Stanton et al. 2026.