DB10717
- The traditional view on Hawking radiation is that black holes emit (massless)
photons as well as massive particles, provided that the latter have an energy
at least equal to their rest mass. We have demonstrated that this image is
actually not correct for the massive particles: these are radiated from the
black hole horizon independently of their energy. However, the particles with
an energy smaller than their rest mass only arrive at a finite distance from
the black hole before bouncing back in a boomerang-like fashion and being
re-absorbed by the black hole. We have also suggested several examples of
analogue gravity systems (systems where sound waves or other perturbations
behave as if they were moving in a black-hole spacetime) where such an effect
could realistically be detectable in a laboratory setting.
