91 citations · 427 across the 31 of their papers we have counts for
31 papers
A Catalog-Wide Study of Gravitational-Wave Residuals in GWTC-4 and GWTC-5
Junlin Qin, Zhan-Feng Mai, Dicong Liang +2
Improved sensitivity of the LIGO-Virgo-KAGRA detectors has enabled the accumulation of a large gravitational-wave event catalog, providing an opportunity for catalog-wide residual…
Ensemble-Based Residual Tests of GW231123 across Waveform Models
Dicong Liang, Hai-Tian Wang, Junlin Qin +3
GW231123 is an exceptional gravitational wave event for which different waveform models yield significantly different inferred source parameters. Residual tests provide a direct wa…
Asymptotically-flat Black holes in Bumblebee gravity: Exact solutions and Thermodynamics
Jinbo Yang, Zhan-Feng Mai, Dicong Liang +1
We construct analytic solutions to the bumblebee gravity theory in static and spherically symmetric spacetimes, where the bumblebee vector field admits only a non-vanishing tempora…
Near-Horizon Deformation of Metric and the Black Hole Instability
Shi-Jie Ma, Zhan-Feng Mai, Run-Qiu Yang
Recent time-domain analyses suggest that black hole stability may be sensitive to localized near-horizon geometric deformations, while the underlying spectral mechanism remain uncl…
Shadows and photon spheres of static black holes embedded in a Dehnen-(1,4,5/2)-type dark matter halo with a quintessential field
Hong-Er Gong, Junlin Qin, Yusen Wang +4
This paper investigates the appearance characteristics of static black holes embedded in Dehnen-(1,4,5/2)-type dark matter halos with a quintessential field, focusing on how the da…
The stealth Kerr solution in the bumblebee gravity
Rui Xu, Zhan-Feng Mai, Dicong Liang
In this paper, we find Kerr solution accompanied with a nontrivial vector field as a solution to one of the simplest vector-tensor theories of gravity, namely the bumblebee model w…
Shadow and Optical Imaging in Einstein-Maxwell-Dilaton Black Hole
Junlin Qin, Hong-Er Gong, Yusen Wang +4
This paper investigates photon motion in black hole of Einstein-Maxwell-dilaton theory, exploring black hole shadows and observational characteristics under various accretion model…
The shadows and photon rings of two minimal deformations of Schwarzschild black holes
Hong-Er Gong, Junlin Qin, Yusen Wang +4
This paper primarily investigates the optical characteristics of two minimal Schwarzschild black hole deformations, the Kazakov-Solodukhin and Ghosh-Kumar black holes, under differ…
Numerical study on the robustness of the stability for stable black holes
Zhan-Feng Mai, Run-Qiu Yang
This paper numerically studies if the stability of a stable black hole is robust against the small perturbation on geometry near its event horizon. In an other word, we numerically…
Spectral instability of black holes: relating the frequency domain to the time domain
Yiqiu Yang, Zhan-Feng Mai, Run-Qiu Yang +2
Recent work has shown that the quasinormal mode spectrum of black holes is unstable under small perturbations (of order ) of the radial potential, while the early time-domain ri…
Dynamic instability analysis for bumblebee black holes: the odd parity
Zhan-Feng Mai, Rui Xu, Dicong Liang +1
Spherical black-hole (BH) solutions have been found in the bumblebee gravity where a vector field nonminimally couples to the Ricci tensor. We study dynamic (in)stability associate…
Probing the vector charge of Sagittarius A* with pulsar timing
Zexin Hu, Lijing Shao, Rui Xu +2
Timing a pulsar orbiting around Sagittarius A* (Sgr A*) can provide us with a unique opportunity of testing gravity theories. We investigate the detectability of a vector charge ca…
Superradiant growth anomaly magnification in evolution of vector bosonic condensates bounded by a Kerr black hole with near-horizon reflection
Nayun Jia, Yin-Da Guo, Gui-Rong Liang +2
Ultralight vector particles can form evolving condensates around a Kerr black hole (BH) due to superradiant instability. We study the effect of near-horizon reflection on the evolu…
Superradiant instabilities of massive bosons around exotic compact objects
Lihang Zhou, Richard Brito, Zhan-Feng Mai +1
Superradiantly unstable ultralight particles around a classical rotating black hole (BH) can form an exponentially growing bosonic cloud, which have been shown to provide an astrop…
Extended thermodynamics of the bumblebee black holes
Zhan-Feng Mai, Rui Xu, Dicong Liang +1
As a vector-tensor theory including nonminimal coupling between the Ricci tensor and a vector field, the bumblebee gravity is a potential theory to test Lorentz symmetry violation.…
Probing vector hair of black holes with extreme mass ratio inspirals
Dicong Liang, Rui Xu, Zhan-Feng Mai +1
The bumblebee gravity model, with a vector field nonminimally coupled to gravity, is a natural extension of the Einstein-Maxwell theory. In this theory, a black hole can carry a ve…
Quasi Normal Modes of Black Holes and Detection in Ringdown Process
Yuqian Zhao, Bing Sun, Zhan-Feng Mai +1
Quasi-normal modes (QNMs) of a black hole (BH) are the eigen modes describing the dissipative oscillation of various fields in that spacetime, which can be intrinsically produced b…
Using black holes as rechargeable batteries and nuclear reactors
Zhan-Feng Mai, Run-Qiu Yang
This paper proposes physical processes to use a Schwarzschild black hole as a rechargeable battery and nuclear reactor. As a rechargeable battery, it can at most transform 25\% of…
Extremal Charged Black Holes and Superradiantly Unstable Quasinormal Modes
Zhan-Feng Mai, Run-Qiu Yang, H. Lü
It was recently shown that the extremal charged black holes in STU supergravity suffer from superradiant instability owing to the existence of the unstable (low-frequency) quasibou…
Superradiant Instability of Extremal Black Holes in STU Supergravity
Zhan-Feng Mai, Run-Qiu Yang, H. Lu
We investigate the superradiant (in)stability of the extremal multi-charge static black holes in the STU supergravity model, which reduce to the RN black hole when all the charges…
Dyonic Reissner-Nordstrom Black Holes and Superradiant Stability
Yi-Feng Zou, Jun-Huai Xu, Zhan-Feng Mai +1
Black holes immersed in magnetic fields are believed to be important systems in astrophysics. One interesting topic on these systems is their superradiant stability property. In th…
Superradiantly stability analysis on dyonic stringly black hole
Jia-Hui Huang, Mu-Zi Zhang, Tian-Tian Cao +2
The black hole superradiance phenomena state that when a scalar wave perturbation is properly scattering off a charged or rotating black hole, the energy of the reflected scalar wa…
Stability analysis on charged black hole with non-linear complex scalar
Zhan-Feng Mai, Run-Qiu Yang
It has been shown recently that the charged black hole can be scalarized if Maxwell field minimally couples with a complex scalar which has nonnegative nonlinear potential. We firs…
Quasi-topological Electromagnetism: Dark Energy, Dyonic Black Holes, Stable Photon Spheres and Hidden Electromagnetic Duality
Hai-Shan Liu, Zhan-Feng Mai, Yue-Zhou Li +1
We introduce the quasi-topological electromagnetism which is defined to be the squared norm of the topological 4-form . A salient property is that its energy-momentum te…