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Pitfalls of a power-law parametrization of the primordial power spectrum for primordial black hole formation
2018
Physical Review D
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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
doi:10.1103/physrevd.98.023529
fatcat:ohuchuvnnfdordqa2im3libe7m