Constraints on Cosmic Strings due to Black Holes Formed from Collapsed Cosmic String Loops

Abstract

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.

(Plain Tex, uses tables.tex -- wrapped lines corrected), 11 pages, FERMILAB-Pub-93/137-A

References in corpus (1)

• Black Holes from Nucleating Strings

Cited by in corpus (9)

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• Limits on Black Hole Formation from Cosmic String Loops
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• Pinning down the primordial black hole formation mechanism with gamma-rays and gravitational waves
• Primordial black holes from cusp collapse on cosmic strings
• Constraints on the cosmic string loop collapse fraction from Primordial Black Holes
• Primordial black holes from monopoles connected by strings
• Cosmic String Loops Collapsing to Black Holes
• No black holes from cosmic string cusps