  Thermal emission from a rotating, supermassive star will cause the
configuration to contract slowly and spin up. If internal viscosity and
magnetic fields are sufficiently weak, the contracting star will rotate
differentially. For each of the six initial angular momentum distributions
considered, a cooling supermassive star will likely encounter the dynamical bar
mode instability, which may trigger the growth of nonaxisymmetric bars. This
scenario will lead to the generation of long wavelength gravitational waves,
which could be detectable by future space-based laser interferometers like
LISA.
