Upper limits on the size of a primordial black hole

Details Upper limits on the size of a primordial black hole Upper limits on the size of a primordial black hole

2004-12-06

arxiv.org/abs/astro-ph/0412134v3

Phys.Rev.D71:104009,2005

Astronomy and Astrophysics

Astrophysics

15 pages, accepted for publication in Physical Review D

Scientific paper

10.1103/PhysRevD.71.104009

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

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