The role of non-gaussianities in primordial black hole formation

被引：140

作者：

Atal, Vicente ^{[1
,2
]}

Germani, Cristiano ^{[1
,2
]}

机构：

[1] Univ Barcelona, Dept Fis Fonamental, Marti i Franques 1, E-08028 Barcelona, Spain

[2] Univ Barcelona, Inst Ciencies Cosmos, Marti i Franques 1, E-08028 Barcelona, Spain

来源：

PHYSICS OF THE DARK UNIVERSE | 2019年 / 24卷

关键词：

D O I：

10.1016/j.dark.2019.100275

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We re-analyse current single-field inflationary models related to primordial black holes formation. We do so by taking into account recent developments on the estimations of their abundances and the influence of non-gaussianities. We show that, for all of them, the gaussian approximation, which is typically used to estimate the primordial black holes abundances, fails. However, in the case in which the inflaton potential has an inflection point, the contribution of non-gaussianities is only perturbative. Finally, we infer that only models featuring an inflection point in the inflationary potential, might predict, with a very good approximation, the desired abundances by the sole use of the gaussian statistics. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：9

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