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We present the results of a study that uses numerical simulations to interpret observations of tidally disturbed satellites around the Milky Way. When analysing the simulations from the viewpoint of an observer, we nd a break in the slope of the star count and velocity dispersion proles in our models at the location where unbound stars dominate. We conclude that `extratidal' stars and enhanced velocity dispersions observed in the outskirts of Galactic satellites are caused by contamination by stellar debris from the tidal interaction with the Milky Way. However, a signicant bound population can exist beyond the break radius and we argue that it should not be identied with the tidal radius of the satellite.
Johnston et al. (Mon,) studied this question.