53 citations · 179 across the 10 of their papers we have counts for
10 papers
Linearized modified gravity theories with a cosmological term: advance of perihelion and deflection of light
Hatice Özer, Özgür Delice
Two different ways of generalizing Einstein's general theory of relativity with a cosmological constant to Brans-Dicke type scalar-tensor theories are investigated in the linearize…
Modified Einstein-Gauss-Bonnet gravity: Riemann-Cartan and Pseudo-Riemannian cases
Hatice Özer, Ahmet Baykal, Özgür Delice
A modified Einstein-Gauss-Bonnet gravity in four dimensions where the quadratic Gauss-Bonnet term is coupled to a scalar field is considered. The field equations of the model are o…
On Stationary Axially Symmetric Solutions in Brans-Dicke Theory
Pınar Kirezli, Özgür Delice
Stationary, axially symmetric Brans-Dicke-Maxwell solutions are reexamined in the framework of the Brans-Dicke (BD) theory. We see that, employing a particular parametrization of t…
Superradiance Instability of Small Rotating AdS Black Holes in Arbitrary Dimensions
Özgür Delice, Türküler Durğut
We investigate the stability of dimensional singly rotating Myers-Perry-AdS black holes under superradiance against scalar field perturbations. It is well known that small four…
Brans-Dicke-Maxwell Solutions for Higher Dimensional Static Cylindrical Symmetric Spacetime
Dilek Kazıcı Çiftci, Özgür Delice
In this paper, Brans-Dicke-Maxwell type vacuum solutions are considered for a static cylindrically symmetric spacetime in arbitrary dimensions. Exact solutions are obtained by dire…
Generalized Sparling-Thirring form in the Brans-Dicke theory
Ahmet Baykal, Özgür Delice
The definition of the Sparling-Thirring form is extended to the Brans-Dicke theory. By writing the Brans-Dicke field equations in a formally Maxwell-like form, a superpotential and…
Multi-Scalar-Tensor Equivalents for Modified Gravitational Actions
Ahmet Baykal, Özgür Delice
A general scheme of constructing scalar-tensor equivalents to modified gravitational actions are studied using the algebra of exterior differential forms and the first order formal…
Higher Dimensional Cylindrical or Kasner Type Electrovacuum Solutions
Özgür Delice, Pınar Kirezli, Dilek K. Çiftci
We consider a D dimensional Kasner type diagonal spacetime where metric functions depend only on a single coordinate and electromagnetic field shares the symmetries of spacetime. T…
A Unified Approach to Variational Derivatives of Modified Gravitational Actions
Ahmet Baykal, Özgur Delice
Our main aim in this paper is to promote the coframe variational method as a unified approach to derive field equations for any given gravitational action containing the algebraic…
Cylindrically Symmetric Vacuum Solutions in Higher Dimensional Brans-Dicke Theory
Ahmet Baykal, Dilek K. Ciftci, Ozgur Delice
Higher dimensional, static, cylindrically symmetric vacuum solutions with and without a cosmological constant in the Brans-Dicke theory are presented. We show that, for a negative…