# Effects of critical collapse on primordial black-hole mass spectra

@article{Khnel2015EffectsOC, title={Effects of critical collapse on primordial black-hole mass spectra}, author={Florian K{\"u}hnel and Cornelius Rampf and Marit Sandstad}, journal={The European Physical Journal C}, year={2015}, volume={76}, pages={1-12} }

Certain inflationary models as well as realisations of phase transitions in the early Universe predict the formation of primordial black holes. For most mass ranges, the fraction of matter in the form of primordial black holes is limited by many different observations on various scales. Primordial black holes are assumed to be formed when overdensities that cross the horizon have Schwarzschild radii larger than the horizon. Traditionally it was therefore assumed that primordial black-hole…

## 37 Citations

Merger rate of a subdominant population of primordial black holes

- PhysicsPhysical Review D
- 2018

The formation of astrophysical and primordial black holes influences the distribution of dark matter surrounding them. Black holes are thus expected to carry a dark matter "dress" whose properties…

Primordial Black Holes from Confinement

- Physics
- 2021

A mechanism for the formation of primordial black holes is proposed. Here, heavy quarks of a confining gauge theory produced by de Sitter fluctuations are pushed apart by inflation and get confined…

Impacts of Hawking radiation from primordial black holes in critical collapse model on the light element abundances

- Physics
- 2020

We study the photodisintegration process triggered by the nonthermal electromagnetic Hawking radiation from primordial black holes (PBHs) in critical collapse model. We consider the simplest case…

Steepest growth of the power spectrum and primordial black holes

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

We derive analytic bounds on the shape of the primordial power spectrum in the context of single-field inflation. In particular, the steepest possible growth has a spectral index of ns − 1 = 4 once…

Can massive primordial black holes be produced in mild waterfall hybrid inflation

- Physics
- 2015

We studied the possibility whether the massive primordial black holes (PBHs) surviving today can be produced in hybrid inflation. Though it is of great interest since such PBHs can be the candidate…

Stochastic inflation and primordial black holes

- Physics
- 2020

During inflation, vacuum quantum fluctuations are amplified and stretched to astrophysical distances. They give rise to fluctuations in the cosmic microwave background (CMB) temperature and…

Primordial black holes as generators of cosmic structures

- Physics
- 2018

Primordial black holes (PBHs) could provide the dark matter in various mass windows below $10^2 M_{\odot}$ and those of $30 M_{\odot}$ might explain the LIGO events. PBHs much larger than this might…

A novel formulation of the primordial black hole mass function

- Physics
- 2020

Computations of the primordial black hole (PBH) mass function discussed in the literature have conceptual issues. They stem from the fact that the mass function is a differential quantity and the…

Primordial Black Holes as Dark Matter Candidates

- Physics
- 2021

We review the formation and evaporation of primordial black holes (PBHs) and their possible contribution to dark matter. Various constraints suggest they could only provide most of it in the mass…

Microlensing constraints on primordial black holes with Subaru/HSC Andromeda observations

- PhysicsNature Astronomy
- 2019

Primordial black holes (PBHs) have long been suggested as a viable candidate for the elusive dark matter. The abundance of such PBHs has been constrained using a number of astrophysical observations,…

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