Article
Physics, Multidisciplinary
Marcus A. Khuri, Jordan F. Rainone
Summary: We present the first examples of formally asymptotically flat black hole solutions with horizons of general lens space topology L(p, q). These solutions are five-dimensional static or stationary spacetimes that are regular on and outside the event horizon, and supported by Kaluza-Klein matter fields. Additionally, we obtain new examples of regular gravitational instantons in higher dimensions.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Kai Lin, Yang-Yi Sun, Hongsheng Zhang
Summary: The study examines scalar perturbations in a dynamical Vaidya black hole and explores quasinormal modes using the matrix method. Proper boundary conditions for quasinormal modes in a dynamical black hole are determined for the first time. The results show that eigenfrequencies differ at the apparent horizon and null infinity due to finite velocity propagation of physical interactions.
Article
Astronomy & Astrophysics
Khadije Jafarzade, Mahdi Kord Zangeneh, Francisco S. N. Lobo
Summary: This paper investigates black holes in the consistent Aoki-Gorji-Mukohyama theory of 4D EGB gravity with Born-Infeld nonlinear electrodynamics. It examines optical features such as shadow radius, energy emission rate, and deflection angle, showing that variations in theory parameters have specific effects on optical features of the black hole solution, and this model can be tested through astrophysical observations.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Physics, Particles & Fields
Carmen Gomez-Fayren, Patrick Meessen, Tomas Ortin, Matteo Zatti
Summary: In this study, we use Wald's formalism to investigate the thermodynamics of 4-dimensional electrically charged black-hole solutions in the simplest 5-dimensional Kaluza-Klein theory. We demonstrate how the electric work term, which is present in the 4-dimensional first law of black-hole thermodynamics, arises in the purely gravitational 5-dimensional framework. Additionally, we find an interesting geometric interpretation of the 4-dimensional electrostatic potential, similar to the angular velocity in rotating black holes. Furthermore, we show how the momentum map equation arises as a result of demanding compatibility between the timelike Killing vector of the black-hole solution and the spatial Killing vector of the 5-dimensional background.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Zhan-Feng Mai, Run-Qiu Yang, H. Lu
Summary: This paper numerically demonstrates that the extremal charged black holes in STU supergravity can not only undergo low-frequency superradiant instability, but also excite higher-frequency superradiantly unstable quasinormal modes.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Particles & Fields
Dhruba Jyoti Gogoi, Ali Ovgun, M. Koussour
Summary: In this work, we studied the quasinormal modes of a black hole in f(Q) Sigma nin f(Q) gravity using the Bernstein spectral method, and validated the method with the Pade averaged higher-order WKB approximation method. We considered scalar and electromagnetic perturbations in the black hole spacetime and obtained the corresponding quasinormal modes. We found that the quasinormal frequencies in scalar perturbation are higher than those in electromagnetic perturbation for a non-vanishing nonmetricity scalar Q0. However, the damping rate of gravitational waves is higher for electromagnetic perturbation. Time domain profiles for both types of perturbations were also investigated to confirm the quasinormal mode behavior.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Zhen Li
Summary: Black holes serve as a natural laboratory for the study of particle physics and astrophysics. This study focuses on a newly proposed rotating regular black hole and investigates the behavior of a massive scalar field near it. The research examines how this nonsingular spacetime affects the superradiance instability and quasinormal modes of the scalar field. The results show excellent agreement with previous research in the Kerr limit and provide insights into the effects of black hole spin, regularity, and scalar field mass on the quasinormal modes.
Article
Astronomy & Astrophysics
Che-Yu Chen, Petr Kotlarik
Summary: This paper investigates the quasi-normal modes (QNMs) of a Schwarzschild black hole combined with a gravitating thin disk. The presence of the disk is found to decrease the oscillating frequency and the decay rate. Furthermore, a universal relationship seems to exist within the parameter space where the disk model is considered physical, and this relationship can potentially help differentiate the QNM shifts caused by the disk from those induced by other effects beyond general relativity.
Article
Astronomy & Astrophysics
Kimihiro Nomura, Daisuke Yoshida
Summary: The study focuses on quasinormal modes related to gravitational and electromagnetic perturbations of spherically symmetric charged black holes in nonlinear electrodynamics. It explores a class of Lagrangian with higher-order corrections beyond linear Maxwell electrodynamics, and parametrizes the corrections for quasinormal frequencies in terms of coefficients. The research confirms that under parity, isospectrality of quasinormal modes is generally violated due to nonlinear electrodynamics, and nonlinear effects serve to lengthen oscillation period and enhance damping rate of the quasinormal modes, as shown in the calculations for Euler-Heisenberg and Born-Infeld electrodynamics.
Article
Astronomy & Astrophysics
Guoyang Fu, Dan Zhang, Peng Liu, Xiao-Mei Kuang, Qiyuan Pan, Jian-Pin Wu
Summary: We investigate the scalar field system over a charged Weyl black hole characterized by a parameter lambda. We find that the imaginary part of the quasinormal mode spectra is always negative, indicating the stability of the system under scalar field perturbation. Additionally, both the quasinormal mode spectra and Hawking radiation exhibit qualitatively similar characteristics, increasing with rising lambda and approaching a constant for large lambda. Notably, the ringing tail shows an exponential decay as lambda increases, suggesting a detectable imprint on the ringing tail by future observations.
Article
Astronomy & Astrophysics
A. Kehagias, D. Perrone, A. Riotto
Summary: We demonstrate that the linear perturbations of any spin field in the near-zone limit of the Kerr black hole are equivalent to those of an AdS2 black hole with similar properties. Based on this correspondence, we use the AdS2/CFT1 correspondence and a group theoretical approach to calculate the spectrum of quasinormal modes and Love numbers for Kerr black holes.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Physics, Particles & Fields
Ramon Becar, P. A. Gonzalez, Yerko Vasquez
Summary: We analyze the stability of a charged massive scalar field propagating in the background of a four-dimensional Ernst black hole by studying its quasinormal modes (QNMs). The QNMs are calculated using both the semi-analytical Wentzel-Kramers-Brillouin method and the continued fraction method. It is found that the decay rate of the QNMs decreases with increasing harmonic angular number l for a scalar field mass less than a critical mass, while the behavior is reversed for a scalar field mass greater than the critical mass, with the longest-lived modes corresponding to the lowest angular number.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Multidisciplinary
L. A. Lopez, V Hinojosa
Summary: The quasinormal modes (QNMs) of a charged regular black hole are calculated in the eikonal approximation. It is found that the behavior of the QNMs of a regular charged black hole is determined by the parameter related to the effective cosmological constant at small distances. By comparing with a Reisner-Nordstrom black hole, it is observed that fixing some parameters while varying others affects the QNMs.
CANADIAN JOURNAL OF PHYSICS
(2021)
Article
Physics, Particles & Fields
Jose Luis Blazquez-Salcedo, Carlos A. R. Herdeiro, Sarah Kahlen, Jutta Kunz, Alexandre M. Pombo, Eugen Radu
Summary: In Einstein-Maxwell-scalar models, different classes of black hole solutions are obtained depending on the non-minimal coupling function. The quartic coupling function leads to cold and hot scalarized black hole branches, with only the cold branch having an unstable radial scalar-led mode. The scalar field in the scalarized background solutions breaks the degeneracy between axial and polar modes, with isospectrality slightly broken on the cold branch and strongly broken on the hot branch.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Particles & Fields
Tomas Andrade, Christiana Pantelidou
Summary: We study the scalar and vector channels of gravitational quasinormal modes for Lifshitz black branes in Einstein-Maxwell-Dilaton and Einstein-Proca theories. We find significant differences between the two models, particularly in the dispersion relations for the shear and sound modes. Through the holographic duality, this calculation provides information about the relaxation of momentum and energy flux operators in a putative dual Lifshitz field theory. Comparing with the results obtained directly from Lifshitz hydrodynamics suggests that the mass density of the equilibrium state in the Einstein-Maxwell-Dilaton model is infinite.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Rui An, Xiaodong Xu, Jun Zhang, Bin Wang, Bin Yue
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2019)
Article
Physics, Particles & Fields
Hang Liu, Ziyu Tang, Kyriakos Destounis, Bin Wang, Eleftherios Papantonopoulos, Hongbao Zhang
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Astronomy & Astrophysics
Rui An, Andre A. Costa, Linfeng Xiao, Jiajun Zhang, Bin Wang
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2019)
Article
Physics, Particles & Fields
Mahdis Ghodrati, Xiao-Mei Kuang, Bin Wang, Cheng-Yong Zhang, Yu-Ting Zhou
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Hong Guo, Hang Liu, Xiao-Mei Kuang, Bin Wang
EUROPEAN PHYSICAL JOURNAL C
(2019)
Article
Physics, Particles & Fields
Daniele Gregoris, Yen Chin Ong, Bin Wang
EUROPEAN PHYSICAL JOURNAL C
(2019)
Article
Physics, Particles & Fields
Daniele Gregoris, Yen Chin Ong, Bin Wang
EUROPEAN PHYSICAL JOURNAL C
(2020)
Article
Astronomy & Astrophysics
Linfeng Xiao, Le Zhang, Rui An, Chang Feng, Bin Wang
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2020)
Article
Physics, Particles & Fields
Hong-Hao Ma, Kai Lin, Wei-Liang Qian, Bin Wang
ADVANCES IN HIGH ENERGY PHYSICS
(2020)
Article
Physics, Multidisciplinary
Daniele Gregoris, Yen Chin Ong, Bin Wang
EUROPEAN PHYSICAL JOURNAL PLUS
(2020)
Article
Astronomy & Astrophysics
Weiqiang Yang, Supriya Pan, Eleonora Di Valentino, Bin Wang, Anzhong Wang
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2020)
Article
Astronomy & Astrophysics
Chao Zhang, Xiang Zhao, Anzhong Wang, Bin Wang, Kent Yagi, Nicolas Yunes, Wen Zhao, Tao Zhu
Article
Physics, Nuclear
Hong-Hao Ma, Dan Wen, Kai Lin, Wei-Liang Qian, Bin Wang, Yogiro Hama, Takeshi Kodama
Article
Astronomy & Astrophysics
Linfeng Xiao, Rui An, Le Zhang, Bin Yue, Yidong Xu, Bin Wang
Article
Astronomy & Astrophysics
Kai Lin, Xiang Zhao, Chao Zhang, Tan Liu, Bin Wang, Shaojun Zhang, Xing Zhang, Wen Zhao, Tao Zhu, Anzhong Wang
