From the 1 of 9 linked papers with an AI index.
1 citations · 1 across the 5 of their papers we have counts for
9 papers
Static spheres in black hole spacetimes: pairing, energy conditions, and an upper bound on the innermost radius
Yong Song
In this work, we investigate the existence, relation to the energy conditions, and radial bounds of static spheres in general static, spherically symmetric, asymptotically flat bla…
Bounds on the radius of outermost photon sphere and black hole shadow in -dimensional Einstein gravity
Jiaqi Fu, Yong Song
The paper derives model‑independent upper and lower bounds on the radius of the outermost photon sphere and the black hole shadow for static, spherically symmetric, asymptotically…
Bounds on the photon sphere radius for spherically symmetric black holes in n-dimensional Einstein gravity
Yong Song, Jiaqi Fu, Yiting Cen
The photon sphere, a hypersurface of null circular geodesics, plays a fundamental role in characterizing black hole spacetimes, influencing phenomena such as black hole shadows, gr…
A universal lower bound on the photon sphere radius in higher-dimensional black holes
Yong Song, Jiaqi Fu, Yiting Cen
The photon sphere, a hypersurface of circular null geodesics, plays a fundamental role in characterizing black hole spacetimes, influencing phenomena such as black hole shadows, gr…
Robust topological invariants of timelike circular orbits for spinning test particles in black hole spacetimes
Yong Song, Jiaqi Fu, Yiting Cen
The spin-curvature coupling in the Mathisson-Papapetrou-Dixon (MPD) formalism induces non-geodesic motion, shifting the orbital parameters of spinning test particles in black hole…
A unified topological classification of circular orbits for charged particles in black hole spacetimes
Yong Song, Jia Li, Yiting Cen +3
The study of circular orbits offers profound insights into the structure of spacetime around black holes. While the topological properties of these orbits are well-established for…