Mass-radius relation of intermediate-age disk super star clusters of M82
  We present a complete set of structural parameters for a sample of 99
intermediate-age Super Star Cluster (SSCs) in the disk of M82, and carry out a
survival analysis using the semi-analytical cluster evolution code EMACSS. The
parameters are based on the profile-fitting analysis carried out in a previous
work, with the mass-related quantities derived using a mass-to-light ratio for
a constant age of 100 Myr. The SSCs follow a power-law mass function with an
index ${\alpha}$=1.5, and a log-normal size function with a typical half-light
radius, Rh=4.3 pc, which are 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${\pm}$0.05. A
dynamical analysis of M82 SSCs using EMACSS suggests that 23% 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 ~2
Gyr. However, a group of four massive compact clusters, and another group of
five SSCs at relatively large galactocentric distances, are found to survive
for a Hubble time. The model-predicted mass, Rh, ${\mu_V}$ and core radius of
these surviving SSCs at 12 Gyr are comparable with the corresponding values for
the sample of Galactic globular clusters.
