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gr-qc2026★ 3 cited
A General Discussion on Photon Spheres in Different Categories of Spacetimes
Chen-Kai Qiao, Ping Su, Yang Huang
Photon spheres have attracted considerable interest in the studies of black holes and other astrophysical objects. For different categories of spacetimes (or gravitational sources)…
gr-qc2025
Gravitational Lensing of Euler-Heisenberg Black Hole Surrounded by Perfect Fluid Dark Matter
Ping Su, Chen-Kai Qiao
In this work, we study the gravitational lensing of Euler-Heisenberg black hole surrounded by perfect fluid dark matter. This kind of black hole solution enables us to investigate…
gr-qc2024
Time Delay of Light in the Gravitational lensing of Supermassive Black Holes in Dark Matter Halos
Chen-Kai Qiao, Ping Su
The dark matter halo has non-negligible effects on the gravitational lensing of supermassive black hole in the galaxy center. Our work presents a study on the time-delay of light i…