The Lyman-α Project: Exploring relationships between key spectroscopic features, internal properties, and environments of galaxies over cosmic time

This thesis explores relationships between the Lyman-α transition of hydrogen — one of the few detectable galaxy features in the early Universe — and other galactic properties to better understand how galaxies evolve over cosmic time into what we see around us today. In particular, this work finds a relationship between Lyman-α, the internal motions of galaxies, and their broadband imaging brightness and colours. Extremely large broadband imaging datasets from upcoming mega-facilities will be far too large to study using conventional spectroscopy. This thesis provides a powerful means to exploit these datasets, and understand galaxy evolution on the largest scales.