Abstract

Cosmological simulations allow us to make detailed predictions for the evolution of galaxy halos and intracluster light (ICL) in cluster environments, but the extremely low surface brightnesses of such contents make it difficult to gather observational constraints. Planetary nebulas (PNs) offer a unique tool to investigate these environments owing to their strong [OIII] emission line. Making use of a deep and extended PN sample we show that the halo of M87 and the Virgo ICL are dynamically distinct components with different parent stellar populations.

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