Correlation between ICL mass fraction and merging history of clusters. Top: ICL mass fraction within R₂₀₀ of the cluster as a function of the time since the most recent merger. The mergers are defined following Contreras-Santos et al. (2022), as mass increases of at least 25% of the initial mass in less than half a dynamical time. Bottom: ICL mass fraction as a function of the number of mergers experienced by the cluster since z ∼ 1.5. The clusters are binned by number of mergers experienced, with the bar plot below indicating the number of clusters in each bin. The dots correspond to the median values, while the errors are 16th–84th percentiles.