Euclid’s view of the intracluster light and intracluster globular clusters of the Perseus cluster

Nina Hatch (Univ. of Nottingham, UK)

Abstract: Intracluster light (ICL) and intracluster globular clusters trace the stellar populations that have been stripped from satellite galaxies in clusters. These orphaned stars act as a fossil record of all the dynamical interactions the system has experienced and offers a holistic view of the cluster's history. Thus, the origin and assembly history of the ICL is central to understanding the global evolution of the cluster galaxy population. In addition, the ICL has been shown to be a tool for inferring the radius of the cluster and even its dark matter distribution. Despite being such a useful tool for understanding our Universe, our knowledge of this component is limited because the ICL is faint and extended (hundreds of kpc), so we need deep observations to study it. I will present new Euclid observations of ICL and intracluster globular clusters in the nearby Perseus cluster and highlight how Euclid will revolutionise our understanding of the ICL.