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 …

Large fluctuations and primordial black holes

S Choudhury, M Sami - Physics Reports, 2025 - Elsevier
In this paper, we review in detail different mechanisms of generation of large primordial
fluctuations and their implications for the production of primordial black holes (PBHs) and …

The second data release from the European Pulsar Timing Array-IV. Implications for massive black holes, dark matter, and the early Universe

J Antoniadis, P Arumugam, S Arumugam… - Astronomy & …, 2024 - aanda.org
The European Pulsar Timing Array (EPTA) and Indian Pulsar Timing Array (InPTA)
collaborations have measured a low-frequency common signal in the combination of their …

[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 …

Have pulsar timing array methods detected a cosmological phase transition?

A Addazi, YF Cai, A Marciano, L Visinelli - Physical Review D, 2024 - APS
We show that the recent detection of a gravitational wave (GW) background reported by
various pulsar timing array (PTA) collaborations including NANOGrav-15 yr, PPTA …

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 …

[HTML][HTML] Primordial non-Gaussianity as a saviour for PBH overproduction in SIGWs generated by Pulsar Timing Arrays for Galileon inflation

S Choudhury, K Dey, A Karde, S Panda, M Sami - Physics Letters B, 2024 - Elsevier
We investigate the explicit role of negative local non-Gaussianity, f NL, in suppressing the
abundance of primordial black holes (PBHs) in the single-field model of Galileon inflation …

Probing the Dark Matter density with gravitational waves from super-massive binary black holes

A Ghoshal, A Strumia - Journal of Cosmology and Astroparticle …, 2024 - iopscience.iop.org
Supermassive black hole binaries source gravitational waves measured by Pulsar Timing
Arrays. The frequency spectrum of this stochastic background is predicted more precisely …

Extreme-mass-ratio inspirals in ultralight dark matter

F Duque, CFB Macedo, R Vicente, V Cardoso - Physical Review Letters, 2024 - APS
Previous works have argued that future gravitational-wave detectors will be able to probe
the properties of astrophysical environments where binaries coalesce, including accretion …

[HTML][HTML] Scalar induced gravity waves from ultra slow-roll Galileon inflation

S Choudhury, A Karde, S Panda, M Sami - Nuclear Physics B, 2024 - Elsevier
We consider the production of secondary gravity waves in Galileon inflation with an ultra-
slow roll (USR) phase and show that the spectrum of scalar-induced gravitational waves …