Primordial black holes—perspectives in gravitational wave astronomy

M Sasaki, T Suyama, T Tanaka… - Classical and Quantum …, 2018 - iopscience.iop.org
This article reviews current understanding of primordial black holes (PBHs), with particular
focus on those massive examples ($\gtrsim $$10^{15}~{\rm g} $) which remain at the …

Beyond ΛCDM: Problems, solutions, and the road ahead

P Bull, Y Akrami, J Adamek, T Baker, E Bellini… - Physics of the Dark …, 2016 - Elsevier
Despite its continued observational successes, there is a persistent (and growing) interest in
extending cosmology beyond the standard model, Λ CDM. This is motivated by a range of …

Primordial black holes

A Escrivà, F Kühnel, Y Tada - Black Holes in the Era of Gravitational-Wave …, 2024 - Elsevier
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Planck 2015 results-xiii. cosmological parameters

PAR Ade, N Aghanim, M Arnaud, M Ashdown… - Astronomy & …, 2016 - aanda.org
This paper presents cosmological results based on full-mission Planck observations of
temperature and polarization anisotropies of the cosmic microwave background (CMB) …

Semianalytic calculation of gravitational wave spectrum nonlinearly induced from primordial curvature perturbations

K Kohri, T Terada - Physical Review D, 2018 - APS
Whether or not the primordial gravitational wave (GW) produced during inflation is
sufficiently strong to be observable, GWs are necessarily produced from the primordial …

Steepest growth of the power spectrum and primordial black holes

CT Byrnes, PS Cole, SP Patil - Journal of Cosmology and …, 2019 - iopscience.iop.org
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 …

The first three seconds: a review of possible expansion histories of the early universe

R Allahverdi, MA Amin, A Berlin, N Bernal… - arxiv preprint arxiv …, 2020 - arxiv.org
It is commonly assumed that the energy density of the Universe was dominated by radiation
between reheating after inflation and the onset of matter domination 54,000 years later …

Cosmic microwave background bounds on primordial black holes including dark matter halo accretion

PD Serpico, V Poulin, D Inman, K Kohri - Physical Review Research, 2020 - APS
Even if massive (10 M⊙≲ M≲ 10 4 M⊙) primordial black holes (PBHs) can only account for
a small fraction of the dark matter (DM) in the universe, they may still be responsible for a …

Constraints on primordial curvature power spectrum with pulsar timing arrays

ZQ You, Z Yi, Y Wu - Journal of Cosmology and Astroparticle …, 2023 - iopscience.iop.org
The stochastic signal detected by NANOGrav, PPTA, EPTA, and CPTA can be explained by
the scalar-induced gravitational waves. In order to determine the scalar-induced …

Ultralow mass primordial black holes in the early Universe can explain the pulsar timing array signal

N Bhaumik, RK Jain, M Lewicki - Physical Review D, 2023 - APS
Pulsar timing array collaborations have recently announced the discovery of a stochastic
gravitational wave (GW) background at nanohertz frequencies. We analyze the GW signals …