I work on several projects related to the study of the distant Universe, the galaxy formation and evolution, and the reionization of the Universe. Most of this work is based on observations obtained with the Hubble Space Telescope, using imaging and/or spectroscopy, but also large ground-based telescopes and numerical simulations.
I use the gravitational lensing of massive galaxy clusters to study the faintest galaxies in the distant Universe, which could be responsible for cosmic reionization. In parallel, the study of a population of galaxies with the same physical properties at the peak of the star formation history of the Universe allows us to understand their evolution across cosmic time, and unravel the nature of the progenitors of present-day galaxies.
I am also interested in the Lyman-alpha emission in galaxies. This hydrogen recombination line is the strongest spectral signature is starburst galaxies. It is therefore widely used for the detection but also the study of star formation in high-redshift galaxies. I combine observations and simulations to understand the complex Lyman-alpha emission process for a better interpretation of high-redshift observations based on this emission line.