Quantum Vacuum Instability Near Rotating Stars
  We discuss the Starobinskii-Unruh process for the Kerr black hole. We show how this effect is related to the theory of squeezed states. We then consider a simple model for a highly relativistic rotating star and show that the Starobinskii-Unruh effect is absent. 
A L Matacz, A C Ottewill and P C W Davies