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 …

Model-independent reconstruction of the primordial curvature power spectrum from PTA data

Z Yi, ZQ You, Y Wu - Journal of Cosmology and Astroparticle …, 2024 - iopscience.iop.org
Recently released data from pulsar timing array (PTA) collaborations provide strong
evidence for a stochastic signal consistent with a gravitational-wave background, potentially …

Gravitational and electromagnetic radiation from binary black holes with electric and magnetic charges: hyperbolic orbits on a cone

ZC Chen, SP Kim, L Liu - Communications in Theoretical Physics, 2023 - iopscience.iop.org
We derive the hyperbolic orbit of binary black holes with electric and magnetic charges. In
the low-velocity and weak-field regime, by using the Newtonian method, we calculate the …

Magnetic black holes: From Thomson dipoles to the Penrose process and cosmic censorship

C Dyson, D Pereñiguez - Physical Review D, 2023 - APS
We consider accretion of charged test matter by rotating, magnetic black holes and discuss a
number of aspects in which the interaction of the angular momentum contained in the …

Worldline effective field theory of inspiralling black hole binaries in presence of dark photon and axionic dark matter

A Bhattacharyya, S Ghosh, S Pal - Journal of High Energy Physics, 2023 - Springer
A bstract We investigate the correction to the potential that gives rise to the bound orbits and
radiation from non-spinning inspiralling binary black holes in a dark matter environment …

Detecting vector charge with extreme mass ratio inspirals onto Kerr black holes

C Zhang, H Guo, Y Gong, B Wang - Journal of Cosmology and …, 2023 - iopscience.iop.org
Extreme mass ratio inspirals (EMRIs) are excellent sources for space-based observatories to
explore the properties of black holes and test no-hair theorems. We consider EMRIs with a …

Black hole perturbations and electric-magnetic duality

D Pereñiguez - Physical Review D, 2023 - APS
Black holes can be electromagnetically charged or carry vector charge from new
fundamental fields. Their response to small fluctuations is of paramount importance to study …

Constraints on the primordial curvature power spectrum by pulsar timing array data: a polynomial parameterization approach

Q Fei - Communications in Theoretical Physics, 2024 - iopscience.iop.org
The recent stochastic signal observed jointly by NANOGrav, parkes pulsar timing array,
European pulsar timing array, and Chinese pulsar timing array can be accounted for by …

Analytic kludge waveforms for extreme-mass-ratio inspirals of a charged object around a Kerr-Newman black hole

T Zi, Z Zhou, HT Wang, PC Li, J Zhang, B Chen - Physical Review D, 2023 - APS
We derive the approximate “analytic-kludge” waveforms for the inspiral of a charged stellar-
mass compact object (CO) into a charged massive Kerr-Newman black hole. The …

Merger rate of charged black holes from the two-body dynamical capture

L Liu, SP Kim - Journal of Cosmology and Astroparticle Physics, 2022 - iopscience.iop.org
We consider the two-body dynamical capture of black holes carrying U (1) charge which can
not only correspond to electric or magnetic charge but also have other physical …