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We investigate how the Milky Way tidal field can affect the spatial mixing ofmultiple stellar populations in the globular cluster NGC 6362. We use $N$-bodysimulations of multiple population clusters on the orbit of this cluster aroundthe Milky Way. Models of the formation of multiple populations in globularclusters predict that the second population should initially be more centrallyconcentrated than the first. However, NGC 6362 is comprised of two chemicallydistinct stellar populations having the same radial distribution. We show thatthe high mass loss rate experienced on this cluster's orbit significantlyaccelerates the spatial mixing of the two populations expected from two bodyrelaxation. We also find that for a range of initial second populationconcentrations, cluster masses, tidal filling factors and fraction of firstpopulation stars, a cluster with two populations should be mixed when it haslost 70-80 per cent of its initial mass. These results fully account for thecomplete spatial mixing of NGC 6362, since, based on its shallow present daymass function, independent studies estimate that the cluster has lost 85 percent of its initial mass.

The Dynamics of Multiple Populations in the Globular Cluster NGC 6362