Dark matter in compact stars

J Bramante, N Raj - Physics Reports, 2024 - Elsevier
WDs and neutron stars are far-reaching and multi-faceted laboratories in the hunt for dark
matter. We review detection prospects of wave-like, particulate, macroscopic and black hole …

Primordial black holes and their gravitational-wave signatures

E Bagui, S Clesse, V De Luca, JM Ezquiaga… - Living Reviews in …, 2025 - Springer
In the recent years, primordial black holes (PBHs) have emerged as one of the most
interesting and hotly debated topics in cosmology. Among other possibilities, PBHs could …

[HTML][HTML] Inflationary interpretation of the stochastic gravitational wave background signal detected by pulsar timing array experiments

S Vagnozzi - Journal of High Energy Astrophysics, 2023 - Elsevier
Various pulsar timing array (PTA) experiments (NANOGrav, EPTA, PPTA, CPTA, including
data from InPTA) very recently reported evidence for excess red common-spectrum signals …

Scalar-induced gravitational wave interpretation of PTA data: the role of scalar fluctuation propagation speed

S Balaji, G Domènech… - Journal of Cosmology and …, 2023 - iopscience.iop.org
Pulsar timing arrays gathered evidence of the presence of a gravitational wave background
around nHz frequencies. If the gravitational wave background was induced by large and …

PBHs and GWs from 𝕋2-inflation and NANOGrav 15-year data

SAH Mansoori, F Felegary, A Talebian… - Journal of Cosmology …, 2023 - iopscience.iop.org
In this paper, we propose a novel mechanism in Bbb T 2-inflation to enhance the power
spectrum large enough to seed primordial black holes (PBHs) formation. To accomplish this …

Singling out SO (10) GUT models using recent PTA results

S Antusch, K Hinze, S Saad, J Steiner - Physical Review D, 2023 - APS
In this work, we construct promising model-building routes towards SO (10) grand unified
theory inflation and examine their ability to explain the recent pulsar timing arrays (PTAs) …

Translating nano-Hertz gravitational wave background into primordial perturbations taking account of the cosmological QCD phase transition

KT Abe, Y Tada - Physical Review D, 2023 - APS
The evidence of the nano-Hertz stochastic gravitational wave (GW) background is reported
by multiple pulsar timing array collaborations. While a prominent candidate of the origin is …

Confronting sound speed resonance with pulsar timing arrays

JH **, ZC Chen, Z Yi, ZQ You, L Liu… - Journal of Cosmology …, 2023 - iopscience.iop.org
The stochastic signal detected by pulsar timing arrays (PTAs) has raised great interest in
understanding its physical origin. Assuming the signal is a cosmological gravitational-wave …

NANOGrav signal from axion inflation

X Niu, MH Rahat - Physical Review D, 2023 - APS
Several pulsar timing arrays including NANOGrav, EPTA, PPTA, and CPTA have recently
reported the observation of a stochastic background of gravitational wave spectrum in the …

Probing the equation of state of the early Universe with pulsar timing arrays

L Liu, ZC Chen, QG Huang - Journal of Cosmology and …, 2023 - iopscience.iop.org
The recently released data by pulsar timing array (PTA) collaborations have amassed
substantial evidence corroborating the existence of a stochastic signal consistent with a …