Stardust Galaxies at z>9: A Dust-Origin Transition Behind the Excess of UV-Bright Galaxies
The study investigates why UV-bright galaxies at high redshifts ($z>9$) show unusually low dust attenuation compared to predictions. It proposes a transition in dust origin: initially, dust is produced by supernovae and processed by reverse shocks, leading to low opacity. This shifts later to efficient interstellar medium grain growth as metallicity increases.