Felix Willenborg
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The scalar angular Teukolsky equation and its solution for the Taub-NUT spacetime Open
The Taub-NUT spacetime offers many curious insights into the solutions of Einstein's electrovacuum equation. In the Bonnor interpretation, this spacetime possesses so-called Misner strings, which induce phenomena strikingly analogous to Di…
Exact wave-optical imaging of a Kerr-de Sitter black hole using Heun's equation Open
Spacetime perturbations due to scalar, vector, and tensor fields on a fixed background geometry can be described in the framework of Teukolsky's equation. In this work, wave scattering is treated analytically, using the Green's function me…
Geodesic motion around traversable wormholes supported by a massless conformally coupled scalar field Open
We consider a traversable wormhole solution of Einstein's gravity conformally coupled to a massless scalar field, a solution derived by Barcelo and Visser based on the JNWW spacetime. We study the geodesic motion of time-, light- and space…