Using the James Webb Space Telescope, we looked at two very early galaxies living during the Epoch of Reionization. After a careful and detailed analysis of the light they emit, we found that these two galaxies may not play a substantial role in ionizing the neutral hydrogen in the intergalactic medium.

The advances in numerical simulations have enabled tremandous progress when simulating highly complex astrophysical processes. In two recent papers, I dive into how the comparison of observations and astrophysical simulations to improve our understanding of how galaxy evolves.

For future nuclear physics experiments involving particle collisions at extreme rates, one need to reconstruct the particle trajectories in real time. In this paper, we designed a pattern recognition method that approaches the theoretical requirements.