The intracluster light fraction across redshift and environment

The intracluster light (ICL) is a tracer of galaxy cluster assembly, being formed due to galaxy interactions and mergers. Characterising it across a diverse range of redshifts and environments is crucial to our understanding of the evolutionary histories of galaxy clusters and will be made possible with new large surveys like Euclid and LSST. Up to now, only small samples have been studied due to the ICL's low surface brightness and the challenges involves in measuring it on a large scale. Using a novel machine learning method, we have measured the ICL fraction using images from the Hyper Suprime-Cam Subaru Strategic Program. I will present the results of our analysis of this sample, studying trends in redshift, halo mass, and cluster dynamical state. I will discuss what these trends reveal about the formation and evolution of the ICL and the galaxies within, and how we will use LSST data to expand our sample even further.