Callum T. Donnan

The evolution of [O <scp>iii</scp>]  + Hβ equivalent width from <i>z</i> ≃ 3−8: implications for the production and escape of ionizing photons during reionization

The <i>JWST</i> EXCELS survey: probing strong-line diagnostics and the chemical evolution of galaxies over cosmic time using <i>Te</i>-metallicities

The <i>JWST</i> EXCELS survey: an extremely metal-poor galaxy at <i>z</i> = 8.271 hosting an unusual population of massive stars

The <i>JWST</i> EXCELS survey: tracing the chemical enrichment pathways of high-redshift star-forming galaxies with O, Ar, and Ne abundances

The <i>JWST</i> EXCELS survey: direct estimates of C, N, and O abundances in two relatively metal-rich galaxies at <i>z</i> ≃ 5

The <i>JWST</i> EXCELS survey: too much, too young, too fast? Ultra-massive quiescent galaxies at 3 &amp;lt; z &amp;lt; 5

The NIRVANDELS survey: the stellar and gas-phase mass-metallicity relations of star-forming galaxies at z = 3.5

Confirmation and refutation of very luminous galaxies in the early Universe

Connecting the escape fraction of Lyman-alpha and Lyman-continuum photons in star-forming galaxies at z <b>≃</b> 4–5