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Evaporation of Primordial Black Holes in the Early Universe: Mass and Spin Distributions
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abstract
Many cosmological phenomena lead to the production of primordial black holes in the early Universe. These phenomena often create a population of black holes with extended mass and spin distributions. As these black holes evaporate via Hawking radiation, they can modify various cosmological observables, lead to the production of dark matter, modify the number of effective relativistic degrees of freedom, $N_{\rm eff}$, source a stochastic gravitational wave background and alter the dynamics of baryogenesis. We consider the Hawking evaporation of primordial black holes that feature non-trivial mass and spin distributions in the early Universe. We demonstrate that the shape of such a distribution can strongly affect most of the aforementioned cosmological observables. We outline the numerical machinery we use to undertake this task. We also release a new version of FRISBHEE that handles the evaporation of primordial black holes with an arbitrary mass and spin distribution throughout cosmic history.
Forward citations
Cited by 4 Pith papers
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Revisiting PBH accretion, evaporation and their cosmological consequences
Relativistic accretion onto Kerr primordial black holes gives roughly 4.5x mass growth and fast spin-down, strengthening BBN bounds, lowering the survival mass to ~2.7e14 g, and erasing the high-frequency stochastic g...
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Baryogenesis via Asymmetric Evaporation of Primordial Black Holes
Evaporating primordial black holes, biased by a new gravitational interaction, can reproduce the observed baryon asymmetry once entropy dilution and chemical-potential-dependent emission are included.
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Page Time of Primordial Black Holes in the Standard Model and Beyond
For Standard Model emission, a Schwarzschild primordial black hole of about 6.23 x 10^14 grams would reach its Page time at the current age of the Universe.
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ALP production from light primordial black holes: The role of superradiance
Superradiance from spinning light primordial black holes can boost moduli production by about ten orders of magnitude, and the resulting axion-like dark radiation tightens Planck-based limits on these black holes.
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