3 papers
gr-qc2025
Instability and Information Production Around Kerr Black Holes: Effects on Entropy and the Shadow
Aydin Tavlayan, Bayram Tekin
Massless or massive particles in unstable orbits around a Kerr black hole exhibit exponentially unstable motion when perturbed. They either plunge into the black hole or escape to…
gr-qc2020
Exact Formulas for Spherical Photon Orbits Around Kerr Black Holes
Aydin Tavlayan, Bayram Tekin
Exact formulas relating the radii of the spherical photon orbits to the black hole's rotation parameter and the effective inclination angle of the orbit have been known only for eq…
hep-th2020
Event Horizon Detecting Invariants
Aydin Tavlayan, Bayram Tekin
Some judiciously chosen local curvature scalars can be used to invariantly characterize event horizons of black holes in dimensions, but they fail for the three dimensional…