5 papers
Observational Signatures of Thin Accretion Disks around Rotating Black Holes Embedded in Dark Matter Halos
Jia-Ying Zhang, Wei-Lun Tong, Zhen Li
Black holes embedded in a dark matter background represent an important candidate model that extends the standard vacuum case, characterizing the strong gravitational environments…
Shadow of Rotating Black Hole Immersed in Dark Matter Halo
Yong-You Liu, Tian-Yun Ye, Zhen Li
The recent black hole shadow observations by the Event Horizon Telescope provide a unique opportunity to probe both the strong gravity regime and the environment surrounding superm…
Observational Constrains on the Sgr A Black Hole Immersed in a Dark Matter Halo: Shadow and S2 Star Orbit
Zhen Li
It is widely believed that Sgr A, located at the center of our Galaxy, is a supermassive black hole. Recent observations of its shadow and long-term monitoring of the S2 star h…
Thin Accretion Disk Around Rotating Hairy Black Hole: Radiative Property and Optical Appearance
Zhen Li, Xiao-Kan Guo
The gravitational decoupling method systematically generates hairy modifications to the solutions in general relativity due to new gravitational sources. In view of the recent adva…
Observational Features of Thin Accretion Disk Around Rotating Regular Black Hole
Zhen Li
Rotating regular black hole, as a promising extension beyond general relativity, offer a phenomenological model that resolves spacetime singularities. In this study, we investigate…