7 papers
Gravitational Lensing of Gravitational Waves: Towards a Higher-order Geometric-optics Approach
Zhao Li, Shaoqi Hou, Wen Zhao
In this work, we study the gravitational lensing of gravitational waves (GWs) by extending the geometric-optics approximation to higher order. With the help of the Newman-Penrose f…
Gravitational Lensing of Gravitational Waves: Spin-wave Optics through Black Hole Scattering
Zhao Li, Shaoqi Hou, Wen Zhao
Gravitational-wave (GW) scattering in strong gravitational fields is a central problem in GW lensing. Yet, conventional treatments based on asymptotic expansions suffer from diverg…
Rigorous calculation of scalar scattering in Schwarzschild background: the convergence of partial-wave series and Poisson spot
Zhao Li, Wen Zhao
Black hole (BH) perturbation theory and the scattering models provide a powerful framework for studying gravitational lensing at the wave-optics level. However, conventional calcul…
Dynamics and gravitational radiation of binaries with spin precession and eccentricity in dynamical Chern-Simons gravity
Zhao Li, Wen Zhao
Testing parity symmetry constitutes a critical aspect in gravitational physics. As a representative parity-violating theory, dynamical Chern-Simons (dCS) gravity has attracted sign…
Forecast Analysis of Astrophysical Stochastic Gravitational Wave Background beyond general relativity: A Case Study on Brans-Dicke Gravity
Ran Chen, Zhao Li, Yin-Jie Li +4
Scalar-tensor gravity, exemplified by Brans-Dicke (BD) gravity, introduces additional scalar polarization modes that contribute scalar radiation alongside tensor modes. We conduct…
A complete waveform comparison of post-Newtonian and numerical relativity in eccentric orbits
Hao Wang, Yuan-Chuan Zou, Qing-Wen Wu +2
This study presents a thorough comparative analysis between post-Newtonian (PN) and numerically relativistic (NR) waveforms in eccentric orbits, covering nonspinning and spin-align…