5 citations · 11 across the 8 of their papers we have counts for
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Trapped photon region in the phase space of sub-extremal Kerr-Newman and Kerr-Sen spacetimes
Carla Cederbaum, Karim Mosani
We analyse the geometry and topology of the trapped photon region in the domain of outer communication of sub-extremal Kerr-Newman and Kerr-Sen spacetimes. Specifically, we show th…
Uniqueness of equipotential photon surfaces in 4-dimensional static vacuum asymptotically flat spacetimes for positive, negative, and zero mass -- and a new partial proof of the Willmore inequality
Carla Cederbaum, Albachiara Cogo, Axel Fehrenbach
We present different proofs of the uniqueness of 4-dimensional static vacuum asymptotically flat spacetimes containing a connected equipotential photon surface or in particular a c…
Black Hole and Equipotential Photon Surface Uniqueness in 4-dimensional Asymptotically Flat Electrostatic Electro-Vacuum Spacetimes
Stefano Borghini, Carla Cederbaum, Albachiara Cogo
We study 4-dimensional asymptotically flat electrostatic electro-vacuum spacetimes with a connected black hole, photon sphere, or equipotential photon surface inner boundary. Our a…
On equipotential photon surfaces in (electro-)static spacetimes of arbitrary dimension
Carla Cederbaum, Sophia Jahns, Olivia Vičánek Martínez
We study timelike, totally umbilic hypersurfaces -- called photon surfaces -- in -dimensional static, asymptotically flat spacetimes, for . First, we give a complete…
Some new perspectives on the Kruskal--Szekeres extension with applications to photon surfaces
Carla Cederbaum, Markus Wolff
It is a well-known fact that the Schwarzschild spacetime admits a maximal spacetime extension in null coordinates which extends the exterior Schwarzschild region past the Killing h…