Black Holes from Nucleating Strings

Abstract

We evaluate the probability that a loop of string that has spontaneously nucleated during inflation will form a black hole upon collapse, after the end of inflation. We then use the observational bounds on the density of primordial black holes to put constraints on the parameters of the model. Other constraints from the distortions of the microwave background and emission of gravitational radiation by the loops are considered. Also, observational constraints on domain wall nucleation and monopole pair production during inflation are briefly discussed.

27 pages, tutp-92-6

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• The Implications of the COBE-DMR Results for Cosmic Strings
• Contribution of Long Wavelength Gravitational Waves to the CMB Anisotropy

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