56 citations · 451 across the 23 of their papers we have counts for
16 papers · 1 filter
Universal thermodynamic topological classes of the charged dRGT black string
Hao Chen, Meng-Yao Zhang, Yi Yang +2
In this study, we explore universal thermodynamic topological classes of charged dRGT black string within both the canonical ensemble and grand canonical ensemble frameworks, and f…
Echoes of a hairy black hole from gravitational decoupling
Yi Yang, Ali Ovgun, Gaetano Lambiase +2
We study axial gravitational perturbations of a hairy black hole constructed within the framework of gravitational decoupling and investigate the geometric origin of echo-like late…
Ringdown of a black hole sourced by a Burkert-density effective anisotropic source
Yi Yang, Gaetano Lambiase, Ali Ovgun +2
We construct a static, spherically symmetric black hole spacetime sourced by an effective anisotropic matter distribution whose energy density follows the cored Burkert profile. Th…
Black holes surrounded by dark matter spike: Spacetime metrics and gravitational wave ringdown waveforms
Dong Liu, Yi Yang, Zheng-wen Long
The supermassive black holes at the centers of galaxies may be surrounded by dark matter spike, which could leave detectable imprints on the gravitational wave signals they emit. I…
Probing black holes in a dark matter spike of M87 using quasinormal modes
Dong Liu, Yi Yang, Zheng-Wen Long
Dark matter density can be significantly enhanced by the supermassive black hole at the galactic center, leading to a structure called dark matter spike. Dark matter spike may chan…
Probing the black holes in a dark matter halo of M87 using gravitational wave echoes
Dong Liu, Yi Yang, Zheng-Wen Long
Variations at the event horizon structure of a black hole will emit the signals of the gravitational wave echoes associated with the ringdown of the binary black hole merger. In th…
Black hole surrounded by the pseudo-isothermal dark matter halo
Yi Yang, Dong Liu, Ali Övgün +2
The abundance of dark matter in the actual universe motivates us to construct the black hole spacetime enveloped by dark matter. In this paper, we derive a new spherically symmetri…
Modeling the black holes surrounded by a dark matter halo in the galactic center of M87
Dong Liu, Yi Yang, Zhaoyi Xu +1
In this paper, the structure of a dark matter halo can be well described by the mass model of M87 and the Einasto profile for the cold dark matter model, i.e., $ρ_{\text{eina}} (r)…
Rotating black hole mimicker surrounded by the string cloud
Yi Yang, Dong Liu, Ali Övgün +2
Traversable wormholes and regular black holes usually represent completely different scenarios. But in the black bounce spacetime they can be described by a same line element, whic…
Ringing and echoes from black bounces surrounded by the string cloud
Yi Yang, Dong Liu, Zhaoyi Xu +1
In the string theory, the fundamental blocks of nature are not particles but one-dimensional strings. Therefore, a generalization of this idea is to think of it as a cloud of strin…
Quasinormal modes of Kerr-like black bounce spacetime
Yi Yang, Dong Liu, Ali Övgün +2
We investigate the quasinormal mode (QNM) spectrum of a Kerr-like black-bounce spacetime under massive scalar-field perturbations. Starting from the Kerr-like deformation of the Si…
Gravitational ringing and superradiant instabilities of the Kerr-like black holes in a dark matter halo
Dong Liu, Yi Yang, Ali Övgün +2
Supermassive black holes from the center of galaxy may be immersed in a dark matter halo. This dark matter halo may form a "cusp" structure around the black hole and disappear at a…
The ringing of quantum corrected Schwarzschild black hole with GUP
Yujia Xing, Yi Yang, Dong Liu +2
Schwarzschild black holes with quantum corrections are studied under scalar field perturbations and electromagnetic field perturbations to analyze the effect of the correction term…
Probing hairy black holes caused by gravitational decoupling using quasinormal modes and greybody bounds
Yi Yang, Dong Liu, Ali Övgün +2
Gravitational decoupling can add hair to the black holes by adding extra sources. The quasinormal modes of hairy black hole caused by gravitational decoupling for the massless scal…
Echoes of novel black-bounce spacetimes
Yi Yang, Dong Liu, Zhaoyi Xu +3
Gravitational wave echoes can be used as a significant observable to understand the properties of black holes horizon. In addition, echoes would also closely relate to the unique p…
Ringing of a black hole in a dark matter halo
Dong Liu, Yi Yang, Shurui Wu +3
Recently, we obtained the simple metrics of a spherically symmetric black hole in a dark matter halo, and extended to the case of rotation. As the characteristic sound of black hol…