Death of cosmological white holes

Mathematics – Logic

Scientific paper

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Fundamental Problems And General Formalism, Black Holes

Scientific paper

We reexamine Eardley's analysis of the death of white holes, which shows that, due to the accretion of ambient matter, a white hole ceases to radiate significantly after a time scale comparable to its mass. While Eardly only vaguely provided the meaning of such a time scale, we give a precise, operational definition for the lifetime of white holes. Our expression for this lifetime is compatible with Eardley's estimate. We also show that while the present-day observation of a white-hole explosion is very unlikely if the white hole is relatively close by, the prospect for such an observation is much enhanced if the white hole is located at high cosmological redshifts.

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