Effects of the modification of gravity on the production of primordial black holes

Vallejo-Peña, Sergio Andrés; Romano, Antonio Enea

doi:10.1016/j.physletb.2021.136289

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…Other results have also been pointed out in the context of modified gravity, in particular in [275], where the PBH production in G-inflation was studied, as well as in [276], where this was studied with the inclusion of a Gauss-Bonnet term. In [277], the effects on the threshold in Eddington-inspired Born-Infeld gravity were considered.…”

Section: Other Scenarios Of Pbh Formationmentioning

confidence: 86%

PBH Formation from Spherically Symmetric Hydrodynamical Perturbations: A Review

Escrivà

2022

Universe

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Primordial black holes, which could have been formed in the very early Universe due to the collapse of large curvature fluctuations, are currently one of the most attractive and fascinating research areas in cosmology for their possible theoretical and observational implications. This review article presents the current results and developments on the conditions for primordial black hole formation from the collapse of curvature fluctuations in spherical symmetry on a Friedman–Lemaître–Robertson–Walker background and its numerical simulation. We review the appropriate formalism for the conditions of primordial black hole formation, and we detail a numerical implementation. We then focus on different results regarding the threshold and the black hole mass using different sets of curvature fluctuations. Finally, we present the current state of analytical estimations for the primordial black hole formation threshold, contrasted with numerical simulations.

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Section: Other Scenarios Of Pbh Formationmentioning

confidence: 86%

PBH Formation from Spherically Symmetric Hydrodynamical Perturbations: A Review

Escrivà

2022

Universe

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show abstract

“…Other results has been also pointed out in the context of modified gravity, in particular in [269] was studied the PBH production in G-inflation and also in [270] was studied with the inclusion of a Gauss-Bonnet term. In [271] were considered the effects on the threshold in Eddington-inspired-Born-Infeld gravity.…”

Section: Other Scenarios Of Pbh Formationmentioning

confidence: 92%

PBH formation from spherically symmetric hydrodynamical perturbations: a review

Escrivà

2021

Preprint

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Primordial black holes, which could have been formed in the very early Universe due to the collapse of large curvature fluctuations, are nowadays one of the most attractive and fascinating research areas in cosmology for their possible theoretical and observational implications. This review article presents the current results and developments on the conditions for primordial black hole formation from the collapse of curvature fluctuations in spherical symmetry on a Friedman-Lemaître-Robertson-Walker background and its numerical simulation. We review the appropriate formalism for the conditions of primordial black hole formation, and we detail a numerical implementation. We then focus on different results regarding the threshold and the black hole mass using different sets of curvature fluctuations. Finally, we present the current state of analytical estimations for the primordial black hole formation threshold, contrasted with numerical simulations.

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“…Nevertheless at some scales of the power spectrum of comving curvature perturbations there is evidence [1,2] of deviation from scale a power law spectrum. In single scalar field models these deviations could be explained for example by temporary violations of the slow-roll conditions [1,[3][4][5][6] Other possible explanations of these features of the primordial curvature spectrum are multi-fields models [30,31], modified gravity theories [32], or a combination of the two. In this paper we will investigate how these features of the spectrum could be explained by primordial entropy perturbations adopting the model independent MESS approach to the study of primordial curvature perturbations, recently proposed in [33].…”

Section: Introductionmentioning

confidence: 99%

The MESS of the CMB

Rodrguez

Romano

Vallejo-Peña

2021

J. Cosmol. Astropart. Phys.

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We analyze cosmic microwave background (CMB) data taking into account the effects of a momentum dependent effective sound speed (MESS). This approach allows to study the effects of primordial entropy in a model independent way, and its implementation requires a minimal modification of existing CMB fitting numerical codes developed for single scalar field models.We adopt a phenomenological approach, and study the effects a local variation of the MESS around the scale where other analysis have shown some deviation from an approximately scale invariant curvature perturbation spectrum. We obtain a substantial improvement of the fit with respect to a model without MESS, showing that primordial entropy modeled by MESS can be an explanation of these deviations.

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Effects of the modification of gravity on the production of primordial black holes

Cited by 5 publications

References 26 publications

PBH Formation from Spherically Symmetric Hydrodynamical Perturbations: A Review

PBH Formation from Spherically Symmetric Hydrodynamical Perturbations: A Review

PBH formation from spherically symmetric hydrodynamical perturbations: a review

The MESS of the CMB

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