3 papers
gr-qc2026
Scalar absorption beyond geometric optics in Klein-Gordon-separable Johannsen black hole spacetimes
Jining Tang, Yang Huang, Hongsheng Zhang
Johannsen metric is a natural and significant generalization of the Kerr metric, representing the most general stationary, axisymmetric spacetime that preserves the Carter constant…
gr-qc2026
Absorption and scattering of massless scalar waves by Frolov black holes
Jining Tang, Yang Huang, Hongsheng Zhang
We study the absorption and scattering of massless scalar waves by Frolov black holes, a regular deformation of the Reissner--Nordström geometry. A null-geodesic analysis provides…
gr-qc2025
Matching McVittie spacetimes
Jining Tang, Yang Huang, Hongsheng Zhang
Gravitational collapse and bubble evolution in the asymptotical Friedmann-Lemaitre-Robertson-Walker (FLRW) Universe is an intriguing and intricate problem. We systematically analyz…