28 citations · 65 across the 8 of their papers we have counts for
8 papers
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…
Refined Thermodynamics of Black Holes with Proper Conserved Charges
Aydin Tavlayan, Bayram Tekin
Field equations of a classical, geometric, theory of gravity, augmented with some semiclassical considerations strongly suggest that the gravitational field representing a stationa…
Partition Function of a Volume of Space in a Higher Curvature Theory
Aydin Tavlayan, Bayram Tekin
Recently, [Phys. Rev. Lett. 130, 221501 (2023)] Jacobson and Visser calculated the quantum partition function of a fixed, finite volume of a region with the topology of a ball in t…
Instability of a Kerr-type naked singularity due to light and matter accretion and its shadow
Aydin Tavlayan, Bayram Tekin
We study null and timelike constant radii geodesics in the environment of an over-spinning putative Kerr-type naked singularity. We are particularly interested in two topics: first…
Light Rings around Five Dimensional Stationary Black Holes and Naked Singularities
Aydin Tavlayan, Bayram Tekin
The existence of light rings in a spacetime is closely related to the existence of black hole horizons and observables such as the ringdown and the shadow. Black holes, compared to…
Spherical timelike orbits around Kerr black holes
Aydin Tavlayan, Bayram Tekin
We study the order ten polynomial equation satisfied by the radius of the spherical timelike orbits for a massive particle with a generic energy around a Kerr black hole. Even thou…
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…
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…