3 papers
gr-qc2026
Images of Braneworld black holes with radiatively inefficient accretion flows
Chengjia Chen, Yin Hao, Zelin Zhang +2
Horizon-scale imaging acts as a transformative tool for probing spacetime geometry, enabling stringent tests of gravitational theories in the strong-field regime. The Casadio-Fabbr…
gr-qc2025
Near-horizon polarized images of a rotating hairy Horndeski black hole
Chengjia Chen, Qiyuan Pan, Jiliang Jing
Recently, Hou \emph{et al.} [Astrophys. J. Lett. \textbf{988}, L51 (2025)] revealed that the Electric Vector Position Angle (EVPA) of polarization vectors in the near-horizon image…
gr-qc2024
Precessions of spherical orbits in the rotating Melvin black hole spacetime and its constraints from the jet of M87*
Chengjia Chen, Qiyuan Pan, Jiliang Jing
We investigate precessions of spherical orbits of timelike particles in the background of a rotating black hole immersed in the Melvin magnetic field, and probe effects of the magn…