Structural parameters for 99 M82 SSCs

The parameters are based on the profile-fitting analysis carried out in previous work, with the mass-related quantities derived using a mass-to-light ratio for a constant age of 100Myr. The SSCs follow a power-law mass function with an index {alpha}=1.5, and a lognormal size function with a typical half-light radius, R_h_=4.3pc, which is both comparable with the values for clusters in the Magellanic Clouds, rather than in giant spirals.

The majority of the SSCs follow a power-law mass-radius relation with an index of b=0.29+/-0.05. A dynamical analysis of M82 SSCs using EMACSS suggests that 23 per cent of the clusters are tidally limited, with the rest undergoing expansion at present. Forward evolution of these clusters suggests that the majority would dissolve in ~2Gyr.