Since most stars rotate and since the black holes so far observed appear to have resulted from the collapse of stars, I'm wondering whether the black hole radiation hypothesized by Hawking is expected to propagate into their otherwise empty centers, or only outward through their event horizons.
Here is a heuristic image of the feynman diagrams , heuristic because it misses the gravitational vertex that will supply the energy for the reality of the escaping particle. :
As depicted one particle of the pari can escape, and the other enters the event horizon and is eaten up by the black hole. They are generated close to the event horizon.