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Monthly Notices of the Royal Astronomical Society: Letters
The radii of young (<100 Myr) star clusters correlate only weakly with their masses. This shallow relation has been used to argue that impulsive tidal perturbations, or 'shocks', by passing giant molecular clouds (GMCs) preferentially disrupt low-mass clusters. We show that this mass-radius relation is in fact the result of the combined effect of two-body relaxation and repeated tidal shocks. Clusters in a broad range of environments including those like the solar neighbourhood evolve towards adoi:10.1093/mnrasl/slw163 fatcat:5vzfv6zu5nenxba347tmds4szu