Steven Gillman

Postdoctoral Researcher


My research focuses on understanding how galaxies evolve from irregular, unstable turbulent systems at high redshift to the well-ordered rotation dominated galaxies we observe on the Hubble Sequence in the local Universe.
Some of my research projects include:

Integral Field Spectroscopy
By exploiting integral field spectroscopy observations of high-redshift star-forming galaxies, the dynamical motions of the ionised interstellar medium can be quantified. We can begin to constrain how galaxies evolve with cosmic time by analysing correlations between the dynamical properties of 1000s of galaxies and their fundamental properties (e.g. stellar mass, star-formation rate, gas-phase metallicity and rest-frame optical morphology).
More information on some of the surveys I was involved in during my PhD can be found here.

Identifying the sources of ionizing radiation during the Epoch of Reionization is one of the key goals of the James Webb Space Telescope (JWST). The MIRI HUDF Field Imaging Survey (PI: Prof. Göran Östlin) aims to answer this question by detecting sources down to 28.3 magnitude in ~60 hours of MIRI, NIRcam and NIRISS observations. At DTU-Space I am part of the MIRI GTO team working on the reduction and analysis of this data.
Details of the GTO proposal can be found here.