19 papers
Superradiant Bose--Einstein condensates around Kerr black holes
Sen Guo, Lin Wen, Xiao-Xiong Zeng
Ultralight bosonic dark matter can accumulate around a rotating black hole, where superradiance amplifies the field until a macroscopic cloud forms. Whether such a cloud behaves as…
Polarization images of non-topological soliton Bardeen boson stars
Xiao-Xiong Zeng, Chen-Yu Yang, Ke-Jian He +1
In this study, we investigate the polarized images of non-topological soliton Bardeen boson stars by solving the coupled Einstein nonlinear electrodynamics complex scalar field equ…
Imprints of Black Hole Shadows and Polarization Patterns of Various Thick Disks: Bumblebee gravity
Muhammad Israr Aslam, Nazek Alessa, Chen-Yu Yang +1
The main objective of this study is to explore the shadow and polarization patterns of a Kerr-Sen-like BH induced from Bumblebee gravity, which, among other alternative theories of…
Repetitive Penrose process in Konoplya-Zhidenko rotating non-Kerr black holes
Xiao-Xiong Zeng, Dong-Ping Su, Ke Wang
This paper investigates the repetitive Penrose process in Konoplya-Zhidenko rotating non-Kerr black hole, exploring the influence of the deformation parameter on the repetitive Pen…
Gravitational lensing and observational features of a dynamic black hole
Ke-Jian He, Guo-Ping Li, Li-Fang Li +1
In this work, we investigate the gravitational lensing effects and the dynamic evolution of the shadow of Vaidya black holes by employing backward ray-tracing techniques. Within th…
Distinguishing Black Holes and Neutron Stars through Optical Images
Chen-Yu Yang, Xiao-Xiong Zeng
This paper employs the backward ray tracing method to study the optical images of neutron stars under the conditions of a spherical light source and a thin accretion disk, consider…