An improved gamma-ray limit on the density of PBHs

Details An improved gamma-ray limit on the density of PBHs An improved gamma-ray limit on the density of PBHs

2003-04-29

arxiv.org/abs/astro-ph/0304528v1

Astronomy and Astrophysics

Astrophysics

To appear in the 28th ICRC conference proceedings

Scientific paper

Gamma-rays are, with antiprotons, a very efficient way to derive upper limits on the density of evaporating black holes. They have been successfully used in the last decades to severely constrain the amount of Primordial Black Holes (PBHs) in our Universe. This article suggests a little refinement, based on the expected background, to improve this limit by a factor of three. The resulting value is : Omega_PBH < 3.3E-9.

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