147 citations · 811 across the 61 of their papers we have counts for
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Approximate analytical description of apparent horizons for initial data with momentum and spin
Emel Altas, Bayram Tekin
We construct analytical initial data for a slowly moving and rotating black hole for generic orientations of the linear momentum and the spin. We solve the Hamiltonian constraint a…
Comment on "Einstein-Gauss-Bonnet Gravity in 4-Dimensional Space-Time''
Metin Gurses, Tahsin Cagri Sisman, Bayram Tekin
We summarize our proof that the "Einstein-Gauss-Bonnet Gravity in Four-Dimensional Spacetime" introduced in Phys. Rev. Lett. 124, 081301 (2020) does not have consistent field equat…
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…
Bowen-York Model Solution Redux
Emel Altas, Bayram Tekin
Initial value problem in General Relativity is often solved numerically; with only a few exceptions one of which is the "model" solution of Bowen and York where an analytical form…
Is there a novel Einstein-Gauss-Bonnet theory in four dimensions?
Metin Gurses, Tahsin Cagri Sisman, Bayram Tekin
No! We show that the field equations of Einstein-Gauss-Bonnet theory defined in generic dimensions split into two parts one of which always remains higher dimensional, and he…
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…