Primordial black holes and induced gravitational waves from logarithmic non-Gaussianity

We investigate the formation of primordial black hole (PBH) based on numerical relativity simulations and peak theory as well as the corresponding scalar induced gravitational wave (SIGW) signals in the presence of \emph{logarithmic non-Gaussianities} which has recently been confirmed in a wide clas...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2024-11
Main Authors: Inui, Ryoto, Cristian Joana, Motohashi, Hayato, Shi Pi, Tada, Yuichiro, Yokoyama, Shuichiro
Format: Article
Language:English
Subjects:
Antenna arrays
Black holes
Dark matter
Gravitation theory
Gravitational waves
Laser arrays
LISA (antenna)
Logarithms
Numerical relativity
Parameters
Pulsars
Relativity
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigate the formation of primordial black hole (PBH) based on numerical relativity simulations and peak theory as well as the corresponding scalar induced gravitational wave (SIGW) signals in the presence of \emph{logarithmic non-Gaussianities} which has recently been confirmed in a wide class of inflation models. Through numerical calculations, we find certain parameter spaces of the critical thresholds for the type A PBH formation and reveal a maximum critical threshold value. We also find that there is a region where no PBH is produced from type II fluctuations contrary to a previous study. We then confirm that SIGW signals originated from the logarithmic non-Gaussianity are detectable in the Laser Interferometer Space Antenna if PBHs account for whole dark matter. Finally, we discuss the SIGW interpretation of the nHz stochastic gravitational wave background reported by the recent pulsar timing array observations. We find that PBH overproduction is a serious problem for most of the parameter space, while this tension might still be alleviated in the non-perturbative regime.
ISSN:2331-8422