My research initially focused on the multi-wavelength properties of high redshift star-forming galaxies. Essentially redshift is both a proxy for distance and look-back time into the past. Therefore, in studying high-redshift galaxies we are looking at not only the most distant (and faint!) objects, but also looking back in time to when the Universe was just a fraction of its current age.
Galaxies grow in size and complexity as the Universe evolves over time, so by looking at relatively simple systems at high redshift we can hope to form a picture of how the first galaxies formed and how they have evolved into the multitude of diverse systems we see a later times (like the Milky Way). I study these galaxies using observations from multiple telescopes over a range of wavelengths to make comparisions to computer simulations. Observing at multiple wavelengths probes the different physical processes which are occurring within the galaxy, helping us to build a complete picture of how it formed, how it has changed over time and its eventual fate.
More recently my work has been concerned with investigating how large numbers of galaxies are spatially distributed throughout the Universe by observing their positions and accurately calculating their distances away from us. View a complete list of my publications .