65 citations · 275 across the 23 of their papers we have counts for
23 papers
Early-Time Nonlinear Growth in an Unstable Q-Ball Hairy Black Hole
Lang Cheng, Guangzhou Guo, Peng Wang +1
Early-time evolution away from an unstable equilibrium in a nonlinear system is often expected to be governed by the associated linear instability. Combining full nonlinear evoluti…
Schwarzschild Black Holes Immersed in Born-Infeld Magnetic Fields and Their Observational Signatures
Yiqian Chen, Guangzhou Guo, Benrong Mu +1
We investigate the influence of Born-Infeld (BI) nonlinear electrodynamics on magnetic field configurations, photon orbits, and black hole shadows for Schwarzschild black holes imm…
Spin-induced Scalarized Black Holes in Einstein-Maxwell-scalar Models
Lang Cheng, Guangzhou Guo, Peng Wang +1
We construct spin-induced scalarized black hole solutions in a class of Einstein-Maxwell-scalar models, where a scalar field is non-minimally coupled to the electromagnetic field.…
Hairless Black Hole by Superradiance
Sebastian Garcia-Saenz, Guangzhou Guo, Peng Wang +1
We investigate the interplaying effects of black hole scalarization and superradiance in the context of the Einstein-Maxwell-scalar model, with the scalar field possessing electric…
Stable long-term evolution in numerical relativity
Sebastian Garcia-Saenz, Guangzhou Guo, Peng Wang +1
We report on the potential occurrence of a numerical instability in the long-time simulation of black holes using the Baumgarte-Shapiro-Shibata-Nakamura formulation of numerical re…
Spin-induced Scalar Clouds around Kerr-Newman Black Holes
Guangzhou Guo, Peng Wang, Tianshu Wu +1
Recent studies have demonstrated that a scalar field non-minimally coupled to the electromagnetic field can experience a spin-induced tachyonic instability near Kerr-Newman black h…
Black hole accretion of scalar clouds with spontaneous symmetry breaking
Sebastian Garcia-Saenz, Guangzhou Guo, Peng Wang +1
Spontaneous scalarization of black holes typically occurs through the condensation of a scalar field, with the field evolving from a -symmetric phase into a symmetry-breaking…
Stationary Scalar Clouds around Kerr-Newman Black Holes
Guangzhou Guo, Peng Wang, Tianshu Wu +1
This study investigates scalar clouds around Kerr-Newman black holes within the Einstein-Maxwell-scalar model. Tachyonic instabilities are identified as the driving mechanism for s…
Nonlinear Stability of Black Holes with a Stable Light Ring
Guangzhou Guo, Peng Wang, Yupeng Zhang
Recently, ultracompact objects have been found to be susceptible to a new nonlinear instability, known as the light-ring instability, triggered by stable light rings. This discover…
Scalarized Kerr-Newman Black Holes
Guangzhou Guo, Peng Wang, Houwen Wu +1
In this paper, we construct scalarized rotating black holes within the framework of Einstein-Maxwell-scalar models. These models incorporate non-minimal couplings that can induce t…
Superradiance Instabilities of Charged Black Holes in Einstein-Maxwell-scalar Theory
Guangzhou Guo, Peng Wang, Houwen Wu +1
We study time evolutions of charged scalar perturbations on the background of a charged hairy black hole, in which the perturbations can be governed by a double-peak effective pote…
Black Holes with Multiple Photon Spheres
Guangzhou Guo, Yuhang Lu, Peng Wang +2
Recently, asymptotically-flat black holes with multiple photon spheres have been discovered and found to produce distinctive observational signatures. In this paper, we focus on wh…
Appearance of an Infalling Star in Black Holes with Multiple Photon Spheres
Yiqian Chen, Guangzhou Guo, Peng Wang +2
Photon spheres play a pivotal role in the imaging of luminous objects near black holes. In this paper, we examine observational appearances of a star freely falling in hairy black…
Gravitational Lensing by Black Holes with Multiple Photon Spheres
Guangzhou Guo, Xin Jiang, Peng Wang +1
We study gravitational lensing of light by hairy black holes, which, in a certain parameter regime, can possess two photon spheres of different size outside the event horizon. In p…
Echoes from Hairy Black Holes
Guangzhou Guo, Peng Wang, Houwen Wu +1
We study the waveforms of time signals produced by scalar perturbations in static hairy black holes, in which the perturbations can be governed by a double-peak effective potential…
Measuring the primordial curvature perturbations from the scalar induced gravitational waves
Jun Li, Guang-Hai Guo
The scalar induced gravitational waves are produced from primordial curvature perturbations in the second order of perturbations. We constrain the fractional energy density of scal…
Quasinormal Modes of Black Holes with Multiple Photon Spheres
Guangzhou Guo, Peng Wang, Houwen Wu +1
For a static and spherically symmetric black hole, a photon sphere is composed of circular null geodesics of fixed radius, and plays an important role in observing the black hole.…
Thermodynamics and Phase Structure of an Einstein-Maxwell-scalar Model in Extended Phase Space
Guangzhou Guo, Peng Wang, Houwen Wu +1
In this paper, we study thermodynamics and phase structure of asymptotically AdS hairy and Reissner-Nordström-AdS (RNAdS) black holes in the extended phase space, where the cosmolo…
Scalarized Einstein-Maxwell-scalar Black Holes in Anti-de Sitter Spacetime
Guangzhou Guo, Peng Wang, Houwen Wu +1
In this paper, we study spontaneous scalarization of asymptotically anti-de Sitter charged black holes in the Einstein-Maxwell-scalar model with a non-minimal coupling between the…
Measuring the scalar induced gravitational waves from observations
Jun Li, Guang-Hai Guo
We measure the scalar induced gravitational waves from the cosmic microwave background (CMB) observations and the gravitational wave observations. In the CDM+ model, we const…
Measuring the primordial gravitational waves from cosmic microwave background and stochastic gravitational wave background observations
Jun Li, Guang-Hai Guo
We constrain the primordial gravitational waves from cosmic microwave background (CMB) and stochastic gravitational wave background (SGWB) observations. SGWB provides the latest wa…
Strong Cosmic Censorship for a Scalar Field in a Logarithmic-de Sitter Black Hole
Yiqian Chen, Qingyu Gan, Guangzhou Guo
It has been shown that the quasinormal modes of perturebated fields can be used to investigate the validity of strong cosmic censorship (SCC). Relevant issues for Reissner-Nordstro…
Strong Cosmic Censorship for a Scalar Field in a Born-Infeld-de Sitter Black Hole
Qingyu Gan, Guangzhou Guo, Peng Wang +1
It has been shown that the Strong Cosmic Censorship (SCC) can be violated by a scalar field in a near-extremal Reissner-Nordstrom-de Sitter black hole. In this paper, we investigat…