2 papers
gr-qc2026
Acoustic Hawking radiation as a tunnelling effect in Michel accretion
Nisha Jangid, Arnab K. Ray
Michel accretion becomes transonic at the saddle point of a dynamical system. An Eulerian perturbation on the steady inflow produces the metric of an acoustic black hole. As a high…
gr-qc2025
Penetrating the horizon of a hydrodynamic white hole
Nisha Jangid, Arnab K. Ray
In a shallow-water radial outflow the horizon of a hydrodynamic white hole coincides with a standing circular hydraulic jump. The jump, caused by viscosity, makes the horizon visib…