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We show that Smoothed Particle Hydrodynamics (SPH) simulations of dwarfgalaxies interacting with a Milky Way-like disk produce moving groups in thesimulated stellar disk. We analyze three different simulations: one thatincludes dwarf galaxies that mimic the Large Magellanic Cloud, Small MagellanicCloud and the Sagittarius dwarf spheroidal; another with a dwarf galaxy thatorbits nearly in the plane of the Milky Way disk; and a null case that does notinclude a dwarf galaxy interaction. We present a new algorithm to find largemoving groups in the $V_R, V_\phi$ plane in an automated fashion that allows usto compare velocity sub-structure in different simulations, at differentlocations, and at different times. We find that there are significantly moremoving groups formed in the interacting simulations than in the isolatedsimulation. A number of dwarf galaxies are known to orbit the Milky Way, withat least one known to have had a close pericenter approach. Our analysis ofsimulations here indicates that dwarf galaxies like those orbiting our Galaxyproduce large moving groups in the disk. Our analysis also suggests that someof the moving groups in the Milky Way may have formed due to dynamicalinteractions with perturbing dwarf satellites. The groups identified in thesimulations by our algorithm have similar properties to those found in theMilky Way, including similar fractions of the total stellar population includedin the groups, as well as similar average velocities and velocity dispersions.

Dynamically Produced Moving Groups in Interacting Simulations