Constraints on cosmic strings due to black holes formed from collapsed cosmic string loops

Details Constraints on cosmic strings due to black holes formed from collapsed cosmic string loops Constraints on cosmic strings due to black holes formed from collapsed cosmic string loops

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993stin...9331837c&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Black Holes (Astronomy), Cosmology, Gravitational Collapse, String Theory, Dark Matter, Flux Density, Loops, Photons

Scientific paper

The cosmological features of primordial black holes formed from collapsed cosmic string loops are studied. Observational restrictions on a population of primordial black holes are used to restrict f, the fraction of cosmic string loops which collapse to form black holes, and mu, the cosmic string mass-per-unit length. Using a realistic model of cosmic strings, we find the strongest restriction on the parameters f and mu is due to the energy density in 100MeV photons radiated by the black holes. We also find that inert black hole remnants cannot serve as the dark matter. If earlier, crude estimates of f are reliable, our results severely restrict mu, and therefore limit the viability of the cosmic string large-scale structure scenario.

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