Comments on non-Gaussian density perturbations and the production of primordial black holes

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dc.creatorBullock, James S.
dc.creatorPrimack, Joel R.
dc.date1998-06-22
dc.date.accessioned2026-07-07T02:27:15Z
dc.date.available2026-07-07T02:27:15Z
dc.descriptionWe review the basic arguments for the likelihood of non-Gaussian density perturbations in inflation models with primordial black hole (PBH) production. We discuss our derived distributions of field fluctuations and their implications, specifically commenting on the fine-tuning problem. We also discuss how the derived distributions may be affected when linked to metric perturbations. While linking the metric perturbations to field fluctuations in a nonlinear way may be important for determining exact probability distributions, the correct mapping is not self-evident. The calculation of P. Ivanov, which yields skew positive distribution, is based on an ansatz for the behavior of the nonlinear metric perturbation. We note that the ``natural'' generalization of the gauge-invariant formalism favored by Bond and Salopek yields an effective linear link between the distribution of field fluctuations and metric perturbations during inflation.
dc.description4 pages, latex including 2 figures, to appear in the Proceedings of the 3rd International Symposium on Sources and Detection of Dark Matter in the Universe (DM98), Feb. 1998, ed. D. Cline
dc.identifierhttps://arxiv.org/abs/astro-ph/9806301
dc.identifierhttp://arxiv.org/abs/astro-ph/9806301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/12615
dc.subjectAstrophysics
dc.titleComments on non-Gaussian density perturbations and the production of primordial black holes
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