Astrophysical Constraints on Primordial Black Hole Formation from Collapsing Cosmic Strings

Abstract

Primordial Black Holes (PBH) may have formed from the collapse of cosmic string loops. The spectral shape of the PBH mass spectrum can be determined by the scaling argument for string networks. Limits on the spectral amplitude derived from extragalactic gamma-ray and galactic gamma-ray and cosmic ray flux observations as well as constraints from the possible formation of stable black holes remnants are reanalyzed. The new constraints are remarkably close to those derived from the normalization of the cosmic string model to the cosmic microwave background anisotropies.

4 pages, no figures, LaTeX (uses prcrc.sty). To appear in the Proceedings of the Third UCLA Dark Matter Symposium and Primordial Black Hole Workshop (Marina del Rey, CA, February 1998)

References in corpus (1)

• Limits on Black Hole Formation from Cosmic String Loops

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• Gravitational waves $\times$ HI intensity mapping: cosmological and astrophysical applications
• Cosmic String in the BTZ Black Hole Background with Time-Dependant Tension
• String Necklaces and Primordial Black Holes from Type IIB Strings
• Coherent Gravitational Waveforms and Memory from Cosmic String Loops
• Cosmic String Loops Collapsing to Black Holes
• Extended primordial black hole mass functions with a spike