Constraints on cosmic strings due to black holes formed from collapsed cosmic string loops
- NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510-0500 (United States)
- NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510-0500 (United States) University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 (United States)
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 [ital 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 that the energy density in 100 MeV photons radiated by the black holes serves as the strongest restriction on the parameters, such that [ital f][le]10[sup [minus]17] for [ital G][mu]=10[sup [minus]6]. We also find that inert black hole remnants left by black holes formed from collapsed cosmic string loops cannot serve as the dark matter. If earlier, crude estimates that [ital f][similar to]10[sup [minus]12] are reliable, our results severely restrict [mu], and therefore limit the viability of the cosmic string large-scale structure scenario.
- OSTI ID:
- 6278190
- Journal Information:
- Physical Review, D (Particles Fields); (United States), Vol. 48:6; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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