Calculation of the emergent spectrum and observation of primordial black holes

Details Calculation of the emergent spectrum and observation of primordial black holes Calculation of the emergent spectrum and observation of primordial black holes

1997-02-03

arxiv.org/abs/astro-ph/9702027v1

Phys.Rev.Lett.78:3430-3433,1997

Astronomy and Astrophysics

Astrophysics

10 pages, Latex, submitted to PRL

Scientific paper

10.1103/PhysRevLett.78.3430

We calculate the emergent spectrum of microscopic black holes, which emit copious amounts of thermal ``Hawking'' radiation, taking into account the proposition that (contrary to previous models) emitted quarks and gluons do not directly fragment into hadrons, but rather interact and form a photosphere and decrease in energy before fragmenting. The resulting spectrum emits copious amount of photons at energies around 100MeV. We find that the limit on the average universal density of black holes is not significantly affected by the photosphere. However we also find that gamma ray satellites such as EGRET and GLAST are well suited to look for nearby black holes out to a distance on the order of 0.3 parsecs, and conclude that if black holes are clustered locally as much as luminous matter, they may be directly detectable.

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