Spatial and orbital planes of the Milky Way satellites: unusual but consistent with ΛCDM

ABSTRACT We examine the spatial distribution and orbital pole correlations of satellites in a suite zoom-in high-resolution dissipationless simulations Milky Way (MW)-sized haloes. use measured to estimate incidence satellite configurations as flattened correlated their system MW. confirm that this is sensitive radial subhaloes thereby processes affect it, such artificial disruption due numerical effects central disc. Controlling for resolution bracketing disc, we find MW somewhat unusual (at ≈2–3σ level) but statistically consistent with Lambda cold dark matter model, general agreement results conclusions other recent studies.