A More Direct Method for Studying the Cosmic Velocity Correlation Function

We derive the estimators of the radial and transverse large-scale cosmic velocity field correlation functions, which allow direct comparisons with linear theory predictions and the full three-dimensional velocity correlation functions. We generate realistic simulated mock catalogues with both random and Local Group observers using the Outer Rim simulation suites. The comparison between simulations and CosmicFlows-3 reveals the effect of Local Group Motion on the cosmic velocity correlation functions and the bias of different observers.