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Using the latest cosmological hydrodynamic N-body simulations of groups andclusters, we study how location in phase-space coordinates at $z$$=$$0$ canprovide information on environmental effects acting in clusters. We confirm theresults of previous authors showing that galaxies tend to follow a typical pathin phase-space as they settle into the cluster potential. As such, differentregions of phase-space can be associated with different times since firstinfalling into the cluster. However, in addition, we see a clear trend betweentotal mass loss due to cluster tides, and time since infall. Thus we findlocation in phase-space provides information on both infall time, and tidalmass loss. We find the predictive power of phase-space diagrams remains evenwhen projected quantities are used (i.e. line-of-sight velocities, andprojected distances from the cluster). We provide figures that can be directlycompared with observed samples of cluster galaxies and we also provide the dataused to make them as supplementary data, in order to encourage the use ofphase-space diagrams as a tool to understand cluster environmental effects. Wefind that our results depend very weakly on galaxy mass or host mass, so thepredictions in our phase-space diagrams can be applied to groups or clustersalike, or to galaxy populations from dwarfs up to giants.

Phase-space Analysis in the Group and Cluster environment: Time since Infall and Tidal Mass Loss