228 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Middle East Technical UniversityTR19 papers
- Bilkent UniversityTR16 papers
- Usak UniversityTR5 papers
- University of KurdistanIR3 papers
- Ankara UniversityTR2 papers
- Centro de Estudios CientíficosCL2 papers
- Istanbul Technical UniversityTR2 papers
- University of GroningenNL2 papers
- Adana Science and Technology UniversityTR1 paper
- Aix-Marseille UniversitéFR1 paper
- Amasya ÜniversitesiTR1 paper
- Ankara Bilim Üniversitesi1 paper
15 papers · 1 filter
Almost Universal Metrics
Metin Gurses, Tahsin Cagri Sisman, Bayram Tekin
A metric is called universal if every symmetric conserved rank-two tensor constructed locally from the metric, the curvature, and covariant derivatives of the curvature is proporti…
Generalized Vaidya Spacetime in Cotton and Conformal Killing Theories
Metin Gürses, Yaghoub Heydarzade, Çetin Şentürk
We demonstrate that the non-vacuum field equations of Cotton gravity and Conformal Killing gravity admit a generalized class of Vaidya-type solutions. In particular, beyond the sta…
Wave Metrics in the Cotton and Conformal Killing Gravity Theories
Metin Gürses, Yaghoub Heydarzade, Çetin Şentürk
We study wave metrics in the context of Cotton Gravity and Conformal Killing Gravity. First, we consider pp-wave metrics with flat and non-flat wave surfaces and show that they are…
Classical double copy in the black hole mini-superspace
Gokhan Alkac, Mehmet Kemal Gumus, Mehmet Ali Olpak
We give a novel formulation of classical double copy in the mini-superspace of static, spherically symmetric black holes where the map between the solutions of general relativity a…
Minimal Einstein-Aether Theory
Metin Gurses, Cetin Senturk, Bayram Tekin
We show that there is a phenomenologically and theoretically consistent limit of the generic Einstein-Aether theory in which the Einstein-Aether field equations reduce to Einstein…
Israel-Wilson-Perjes Metrics in a Theory with a Dilaton Field
Metin Gurses, Tahsin Cagri Sisman, Bayram Tekin
We are interested in the charged dust solutions of the Einstein field equations in stationary and axially symmetric spacetimes; and inquire if the naked singularities of the Israel…
Kerr-Schild-Kundt Metrics in Generic Einstein-Maxwell Theories
Metin Gurses, Yaghoub Heydarzade, Cetin Senturk
We study Kerr-Schild-Kundt class of metrics in generic gravity theories with Maxwell's field. We prove that these metrics linearize and simplify the field equations of generic grav…
Kerr-Schild-Kundt Metrics in Generic Gravity Theories with Modified Horndeski Couplings
Metin Gurses, Yaghoub Heydarzade, Cetin Senturk
The Kerr-Schild-Kundt (KSK) metrics are known to be one of the universal metrics in general relativity, which means that they solve the vacuum field equations of any gravity theory…
Exact gyratons in higher and infinite derivative gravity
Ivan Kolář, Tomáš Málek, Suat Dengiz +1
We study solutions describing spinning null sources called gyratons in generic theories of gravity with terms that are quadratic in curvature and contain an arbitrary number of cov…
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…
Impulsive waves in ghost free infinite derivative gravity in anti-de Sitter spacetime
Suat Dengiz, Ercan Kilicarslan, Ivan Kolář +1
We study exact impulsive gravitational waves propagating in anti-de Sitter spacetime in the context of the ghost free infinite derivative gravity. We show that the source-free theo…
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…
NAT Black Holes
Metin Gurses, Yaghoub Heydarzade, Cetin Senturk
We study some physical properties of black holes in Null Aether Theory (NAT)--a vector-tensor theory of gravity. We first review the black hole solutions in NAT and then derive the…
From Smooth Curves to Universal Metrics
Metin Gurses, Tahsin Cagri Sisman, Bayram Tekin
A special class of metrics, called universal metrics, solve all gravity theories defined by covariant field equations purely based on the metric tensor. Since we currently lack the…
Kerr-Schild--Kundt Metrics are Universal
Metin Gurses, Tahsin Cagri Sisman, Bayram Tekin
We define (non-Einsteinian) universal metrics as the metrics that solve the source-free covariant field equations of generic gravity theories. Here, extending the rather scarce fam…