The ultraviolet continuum slopes of high-redshift galaxies: evidence for the emergence of dust-free stellar populations at z > 10

We present an analysis of the ultraviolet (UV) continuum slopes (\beta) for a sample of 172 galaxy candidates at 8 < z_{\mathrm{phot}} < 16 selected from a combination of JWST NIRCam imaging and COSMOS/UltraVISTA ground-based near-infrared imaging. Focusing primarily on a new sample of 121 galaxies at $\langle z \rangle... Show more