| Upper limits on the size of a primordial black hole (2004) | |||||||||
Abstract | |||||||||
| We provide precise constraints on the size of any black holes forming in the early Universe for a variety of formation scenarios. In particular, we prove that the size of the apparent horizon of a primordial black hole formed by causal processes in a flat Friedmann universe is considerably smaller than the cosmological apparent horizon size for an equation of state $p=k\rho$ ($1/3. Comment: 15 pages, accepted for publication in Physical Review D | |||||||||
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