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On the Schrödinger spectrum of a hydrogen atom with electrostatic Bopp-Landé-Thomas-Podolsky interaction between electron and proton
Holly K. Carley, Michael K. -H. Kiessling, Volker Perlick
The Schrödinger spectrum of a hydrogen atom, modelled as a two-body system consisting of a point electron and a point proton, interacting with a modification of Coulomb's law propo…
Effects of non-linear vacuum electrodynamics on the polarization plane of light
Volker Perlick, Claus Lämmerzahl, Alfredo Macias
We consider the Pleba{ń}ski class of nonlinear theories of vacuum electrodynamics, i.e., Lagrangian theories that are Lorentz invariant and gauge invariant. Our main goal is to der…
Black hole shadow in an expanding universe with a cosmological constant
Volker Perlick, Oleg Yu. Tsupko, Gennady S. Bisnovatyi-Kogan
We analytically investigate the influence of a cosmic expansion on the shadow of the Schwarzschild black hole. We suppose that the expansion is driven by a cosmological constant on…
Finsler geometry as a model for relativistic gravity
Claus Lämmerzahl, Volker Perlick
We give an overview on the status and on the perspectives of Finsler gravity, beginning with a discussion of various motivations for considering a Finslerian modification of Genera…
The shadow of a collapsing dark star
Stefanie Schneider, Volker Perlick
The shadow of a black hole is usually calculated, either analytically or numerically, on the assumption that the black hole is eternal, i.e., that it existed for all time. Here we…