51 citations · 333 across the 16 of their papers we have counts for
15 papers · 1 filter
Quasi-Normal Modes of Loop Quantum Black Holes Formed from Gravitational Collapse
Chao Zhang, Anzhong Wang
In this paper, we study the quasi-normal modes (QNMs) of a scalar field in the background of a large class of quantum black holes that can be formed from gravitational collapse of…
Even- and odd-parity stabilities of black holes in Einstein-Aether gravity
Antonio De Felice, Shinji Mukohyama, Shinji Tsujikawa +2
In Einstein-Aether theories with a timelike unit vector field, we study the linear stability of static and spherically symmetric black holes against both even- and odd-parity pertu…
Linear instability of hairy black holes in Horndeski theory
Chao Zhang, Tao Zhu
Horndeski theory constitutes the most general model of scalar-tensor theories. It has attracted much attention in recent years in relation with black holes, celestial dynamics, sta…
The Quasinormal Modes and Isospectrality of Bardeen (Anti-) de Sitter Black Holes
Ying Zhao, Wentao Liu, Chao Zhang +2
Black holes (BHs) exhibiting coordinate singularities but lacking essential singularities throughout the entire spacetime are referred to as regular black holes (RBHs). The initial…
Universal horizons and black hole spectroscopy in gravitational theories with broken Lorentz symmetry
Chao Zhang, Anzhong Wang, Tao Zhu
The violation of Lorentz invariance (LI) in gravitational theories, which allows superluminal propagations, dramatically alters the causal structure of the spacetime and modifies t…
Imprints of dark matter on gravitational ringing of supermassive black holes
Chao Zhang, Tao Zhu, Xiongjun Fang +1
Gravitational waves emitted from the gravitational ringing of supermassive black holes are important targets to test general relativity and probe the matter environment surrounding…
Gravitational axial perturbations of Schwarzschild-like black holes in dark matter halos
Chao Zhang, Tao Zhu, Anzhong Wang
Gravitational waves emitted by distorted black holes, such as those arising from the coalescence of binary black holes, or a falling compact star into a supermassive black hole, ca…
Odd-parity stability of black holes in Einstein-Aether gravity
Shinji Tsujikawa, Chao Zhang, Xiang Zhao +1
In Einstein-Aether theory, we study the stability of black holes against odd-parity perturbations on a spherically symmetric and static background. For odd-parity modes, there are…
Spherically symmetric static black holes in Einstein-aether theory
Chao Zhang, Xiang Zhao, Kai Lin +3
In this paper, we systematically study spherically symmetric static spacetimes in the framework of Einstein-aether theory, and pay particular attention to the existence of black ho…
No static regular black holes in Einstein-complex-scalar-Gauss-Bonnet gravity
Kai Lin, Shaojun Zhang, Chao Zhang +3
In this brief report, we investigate the existence of 4-dimensional static spherically symmetric black holes (BHs) in the Einstein-complex-scalar-Gauss-Bonnet (EcsGB) gravity with…
Gravitational waves from the quasi-circular inspiral of compact binaries in Einstein-aether theory
Chao Zhang, Xiang Zhao, Anzhong Wang +5
We study gravitational waves emitted by a binary system of non-spinning bodies in a quasi-circular inspiral within the framework of Einstein-aether theory. In particular, we comput…
Constraints of general screened modified gravities from comprehensive analysis of binary pulsars
Xing Zhang, Wen Zhao, Tan Liu +6
Testing gravity by binary pulsars nowadays becomes a key issue. Screened modified gravity is a kind of scalar-tensor theory with screening mechanism in order to satisfy the tight S…
Angular momentum loss for eccentric compact binary in screened modified gravity
Xing Zhang, Wen Zhao, Tan Liu +6
Gravitational wave (GW) observations provide insight into the gravity regime. These observations relies on the comparison of the data to the GWs model, which depends on the orbital…
Evidence of deviations from general relativity in binary pulsars?
Xing Zhang, Wen Zhao, Tan Liu +6
Testing gravitational theories by binary pulsars nowadays becomes a key issue. For the general screened modified gravity (SMG), the post-Keplerian parameters in the neutron star (N…
Waveforms of compact binary inspiral gravitational radiation in screened modified gravity
Tan Liu, Xing Zhang, Wen Zhao +6
Scalar-tensor gravity, with the screening mechanisms to avoid the severe constraints of the fifth force in the Solar System, can be described with a unified theoretical framework,…