Pitfalls of a power-law parametrization of the primordial power spectrum for primordial black hole formation
Primordial Black Holes (PBHs) can form in the radiation dominated early Universe from the collapse of large density perturbations produced by inflation. A power-law parameterisation of the primordial power spectrum is often used to extrapolate from cosmological scales, where the amplitude of the per...
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| Format: | Article |
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American Physical Society
2018
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| Online Access: | https://eprints.nottingham.ac.uk/53144/ |
| _version_ | 1848798887516569600 |
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| author | Green, Anne M. |
| author_facet | Green, Anne M. |
| author_sort | Green, Anne M. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Primordial Black Holes (PBHs) can form in the radiation dominated early Universe from the collapse of large density perturbations produced by inflation. A power-law parameterisation of the primordial power spectrum is often used to extrapolate from cosmological scales, where the amplitude of the perturbations is well-measured by Cosmic Microwave Background and Large Scale Structure observations, down to the small scales on which PBHs may form. We show that this typically leads to large errors in the amplitude of the fluctuations on small scales, and hence extremely inaccurate calculations of the abundance of PBHs formed. |
| first_indexed | 2025-11-14T20:26:55Z |
| format | Article |
| id | nottingham-53144 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:26:55Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-531442020-05-04T19:47:21Z https://eprints.nottingham.ac.uk/53144/ Pitfalls of a power-law parametrization of the primordial power spectrum for primordial black hole formation Green, Anne M. Primordial Black Holes (PBHs) can form in the radiation dominated early Universe from the collapse of large density perturbations produced by inflation. A power-law parameterisation of the primordial power spectrum is often used to extrapolate from cosmological scales, where the amplitude of the perturbations is well-measured by Cosmic Microwave Background and Large Scale Structure observations, down to the small scales on which PBHs may form. We show that this typically leads to large errors in the amplitude of the fluctuations on small scales, and hence extremely inaccurate calculations of the abundance of PBHs formed. American Physical Society 2018-07-24 Article PeerReviewed Green, Anne M. (2018) Pitfalls of a power-law parametrization of the primordial power spectrum for primordial black hole formation. Physical Review D, 98 (2). 023529. ISSN 2470-0029 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.98.023529 doi:10.1103/PhysRevD.98.023529 doi:10.1103/PhysRevD.98.023529 |
| spellingShingle | Green, Anne M. Pitfalls of a power-law parametrization of the primordial power spectrum for primordial black hole formation |
| title | Pitfalls of a power-law parametrization of the primordial power spectrum for primordial black hole formation |
| title_full | Pitfalls of a power-law parametrization of the primordial power spectrum for primordial black hole formation |
| title_fullStr | Pitfalls of a power-law parametrization of the primordial power spectrum for primordial black hole formation |
| title_full_unstemmed | Pitfalls of a power-law parametrization of the primordial power spectrum for primordial black hole formation |
| title_short | Pitfalls of a power-law parametrization of the primordial power spectrum for primordial black hole formation |
| title_sort | pitfalls of a power-law parametrization of the primordial power spectrum for primordial black hole formation |
| url | https://eprints.nottingham.ac.uk/53144/ https://eprints.nottingham.ac.uk/53144/ https://eprints.nottingham.ac.uk/53144/ |