3 papers
gr-qc2025
Shadow and Quasi-Normal Modes of Schwarzschild-Hernquist Black Hole
Xing-Hui Feng, Guang-Yu Zhang
In this paper we study the shadow and quasi-normal modes (QNMs) of a black hole (BH) surrounded by a dark matter halo with Hernquist-type density distribution, which was reported i…
astro-ph.HE2024
Shadows, rings and optical appearance of a magnetically charged regular black hole illuminated by various accretion disks
Soroush Zare, Luis M. Nieto, Xing-Hui Feng +2
The Event Horizon Telescope (EHT) imaging of the supermassive black holes at the centers of Messier 87 galaxy and the Milky Way galaxy marks a significant step in observing the pho…
gr-qc2024
Axial Gravitational Perturbations of Slowly-Rotating Compact Objects in General Relativity and Beyond
Xing-Hui Feng, Jun Peng
We study the axial gravitational perturbations of slowly-rotating compact objects which are assumed to be supported by anisotropic fluids. We find that the gravitational perturbati…