Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Mai, Zhan"'
Recent work has shown that the quasinormal mode spectrum of black holes is unstable under small perturbations (of order $\epsilon$) of the radial potential, while the early time-domain ringdown waveform is only marginally affected. In this paper we p
Externí odkaz:
http://arxiv.org/abs/2407.20131
Publikováno v:
Phys. Rev. D 109 (2024) 084076
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 associated with the gravitational and vector perturbations of odd parity agains
Externí odkaz:
http://arxiv.org/abs/2401.07757
Publikováno v:
JCAP 04 (2024) 087
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 carried by the Sgr A* black hole (BH) in the bumblebee gravity model wit
Externí odkaz:
http://arxiv.org/abs/2312.02486
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 evolution of this system; by matching three pieces of asymptotic expansions
Externí odkaz:
http://arxiv.org/abs/2309.05108
Publikováno v:
Phys. Rev. D 108 (2023) 103025
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 astrophysical probe to detect ultralight particles and constrain their mass.
Externí odkaz:
http://arxiv.org/abs/2308.03091
Publikováno v:
Phys. Rev. D 108 (2023) 024004
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. Recently, a new class of numerical spherical black holes in the bumbl
Externí odkaz:
http://arxiv.org/abs/2304.08030
Publikováno v:
Phys. Rev. D 107 (2023) 044053
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 vector hair, making the metric deviate from the Schwarzschild metric. To
Externí odkaz:
http://arxiv.org/abs/2212.09346
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 by the linear perturbation theory. With the discovery of the first grav
Externí odkaz:
http://arxiv.org/abs/2212.00747
Autor:
Mai, Zhan-Feng, Yang, Run-Qiu
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 input mass into available electric energy in a controllable and slow w
Externí odkaz:
http://arxiv.org/abs/2210.10587
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) quasibound states associated with a charged massive scalar field. In this pape
Externí odkaz:
http://arxiv.org/abs/2201.11138