9 papers
Angular momentum flux through post-Newtonian order for noncircular nonspinning black-hole binaries in Einstein-Maxwell-dilaton theory
Qi Tan, Peng-Cheng Li
We compute the instantaneous angular momentum flux from nonspinning black hole binaries in Einstein-Maxwell-dilaton theory for generic noncircular orbits up to relative first post-…
Distorting Kerr Images with Parity-Odd Scalar Hair
Qian Wan, Yehui Hou, Yang Huang +3
We investigate thin-disk imaging of Kerr black holes with synchronized scalar hair, focusing on backreacted parity-odd excited states of a complex scalar field minimally coupled to…
Probing Lorentz-violating effects via precession and accretion disk images in a rotating bumblebee spacetime
Qing Ou, Zhen-Bo Wu, Qian Wan +1
We investigate kinematic and optical signatures of Lorentz violation in the strong-field region of a rotating bumblebee spacetime generated by a scalar-gradient bumblebee field. Fo…
Tidal Love numbers for regular black holes
Rui Wang, Qi-Long Shi, Wei Xiong +1
Tidal Love numbers (TLNs) characterize the response of compact objects to external tidal fields and vanish for classical Schwarzschild and Kerr black holes in general relativity. N…
Black hole spacetimes with dark matter spikes: Energy-momentum tensor and backreaction effects
Wei Xiong, Peng-Cheng Li
We study the energy-momentum tensor of a dark matter (DM) spike formed during the adiabatic growth of a black hole embedded in a DM halo, and investigate its backreaction on the sp…
Quasinormal modes and grey-body factors of axial gravitational perturbations of regular black holes in asymptotically safe gravity
Qi-Long Shi, Rui Wang, Wei Xiong +1
In this paper, we present a detailed study of axial gravitational perturbations of the regular black hole solution in asymptotically safe gravity, as proposed in \cite{Bonanno:2023…
Boundary conditions of general black hole perturbations
Wei Xiong, Peng-Cheng Li
Recently, significant progress has been made in the study of black hole (BH) perturbations, both within the framework of general modified gravity theories and in complex environmen…
Quasinormal modes of spontaneous scalarized Kerr black holes
Wei Xiong, Peng-Cheng Li
Recent studies have shown that rotating black holes can undergo spontaneous scalarization, leading to deviations from general relativity in the strong-field regime. We present the…
The rotating solutions beyond the spontaneous scalarization in Einstein-Maxwell-scalar theory
Wei Xiong, Cheng-Yong Zhang, Peng-Cheng Li
The Einstein-Maxwell-scalar (EMS) theory with a quartic coupling function features three branches of fundamental black hole (BH) solutions, labeled as cold, hot, and bald black hol…