4 papers · 1 filter
Exotic Encounters: Buchdahl's Conditions and Physical Black Holes
Ioannis Soranidis, Daniel R. Terno
Black holes are among the most well-known astrophysical objects, yet their physical realisation remains conceptually subtle. We analyse physical black holes -- light-trapping regio…
Padé metrics for black hole perturbations and light rings
Swayamsiddha Maharana, Fil Simovic, Ioannis Soranidis +1
Most distinguishing features of black holes and their mimickers are concentrated near the horizon. In contrast, astrophysical observations and theoretical considerations primarily…
Gravity-induced birefringence in spherically symmetric spacetimes
Sebastian Murk, Daniel R. Terno, Rama Vadapalli
Geometric optics effectively describes the propagation of electromagnetic waves when the wavelength is much smaller than the characteristic length scale of the medium, making wave…
Horizon-bound objects: Kerr--Vaidya solutions
Pravin K. Dahal, Swayamsiddha Maharana, Fil Simovic +1
Kerr-Vaidya metrics are the simplest dynamical axially-symmetric solutions, all of which violate the null energy condition and thus are consistent with the formation of a trapped r…