  We investigate the kinetic heating of neutron stars due to dark matter
scattering in minimal models with scalar lepton partners mediating interactions
which can account for the anomalous magnetic moment of the muon. In particular,
such models in which the dark matter is a thermally produced Majorana fermion
can be extremely difficult to detect at conventional searches. We demonstrate
that future infrared observations of an old neutron star population could
definitively probe the entire parameter space of this scenario.
