Bayram Tekin

E-mail

btekin@metu.edu.tr

Department

Department of Physics

ORCID

0000-0002-0792-9010

Scopus Author ID

6701407460

Web of Science Researcher ID

P-9269-2019

Mass formulas for individual black holes in merging binaries Ozkarsligil, Zeynep Tugce; Tekin, Bayram (2024-03-01) We give formulas for individual black hole masses in a merger, by using Newtonian physics, in terms of the three measured quantities in the detector: the initial wave frequency f 1, the maximum detected frequency (chirp fr...
Nonstationary energy of perfect fluid sources in general relativity Altas, Emel; Tekin, Bayram (2024-02-15) The Arnowitt-Deser-Misner (ADM) energy for asymptotically flat spacetimes or its generalizations to asymptotically nonflat spacetimes measure the energy content of a stationary spacetime, such as a single black hole. Such ...
Kerr-Vaidya type radiating black holes in semiclassical gravity with conformal anomaly Gürses, Metin; Tekin, Bayram (2024-01-15) Static black holes in the conformal anomaly-sourced semiclassical general relativity in four dimensions were recently extended to rotating, stationary solutions. These quantum-corrected black holes show different features ...
Systematic construction of Kastor-Traschen currents and their extensions to generic powers of curvature Ozkarsligil, Zeynep Tugce; Tekin, Bayram (2023-10-15) Kastor and Traschen constructed totally antisymmetric conserved currents that are linear in the Riemann curvature in spacetimes admitting Killing-Yano tensors. The construction does not refer to any field equations and is ...
A new geometric flow on 3-manifolds: the K-flow Tasseten, Kezban; Tekin, Bayram (2023-10-01) We define a new geometric flow, which we shall call the K-flow, on 3-dimensional Riemannian manifolds; and study the behavior of Thurston’s model geometries under this flow both analytically and numerically. As an example,...
Partition function of a volume of space in a higher curvature theory Tavlayan, Aydın; Tekin, Bayram (2023-08-15) Recently, Jacobson and Visser [Partition Function for a Volume of Space, Phys. Rev. Lett. 130, 221501 (2023).PRLTAO0031-900710.1103/PhysRevLett.130.221501] calculated the quantum partition function of a fixed, finite volum...
Perturbative Solution of the Einstein Constraints with Spin and Momentum Far Away From a Binary Source in the Bowen-York Formalism Altas, Emel; Ertugrul, Emine; Tekin, Bayram (2023-06-01) The momentum and Hamiltonian constraints of vacuum Einstein equations, within the Bowen-York formalism, for two interacting black holes in close separation, with anti-parallel spins and anti-parallel linear momenta is stud...
Gauge invariant derivation of zeroth and first laws of black hole thermodynamics Hajian, Kamal; Sheikh-Jabbari, M.M.; Tekin, Bayram (2022-11-15) Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further di...
Anomalous dispersion in gravity theories Altas, Emel; Kilicarslan, Ercan; Tekin, Bayram (2022-03-01) A wave pulse (be it a gravitational wave or a light wave) undergoes anomalous dispersion in a vacuum in flat spacetimes with an even number of spatial dimensions even if all the frequencies move at the same speed. Such an ...
Basics of Apparent horizons in black hole physics Altas, E.; Tekin, Bayram (2022-02-10) © 2021 Published under licence by IOP Publishing Ltd.Event Horizon, a null hypersurface defining the boundary of the black hole region of a spacetime, is not particularly useful for evolving black holes since it is non-loc...

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