The stars are possibly the remains of a globular cluster where a middleweight black hole could develop through runaway star collisions. GCIRS 13E could also be a dark star cluster which forms in the inner Galaxy if the evaporation rate of stars from the cluster is faster due to a strong tidal field than the depletion of the black hole content though ejections.
Stars might be remnants of a globular cluster where a middleweight black hole could form through frequent star collisions. GCIRS 13E could also be a dark star cluster that forms in the inner Galaxy if the evaporation rate of stars from the cluster exceeds the loss of black hole content due to strong tidal forces.