8 citations · 16 across the 2 of their papers we have counts for
7 papers
Scalar field emulator via anisotropically deformed vacuum energy: Application to dark energy
Ozgur Akarsu, Nihan Katirci, Anjan A. Sen +1
We introduce a generalization of the usual vacuum energy, called `deformed vacuum energy', which yields anisotropic pressure whilst preserving zero inertial mass density. It couple…
Rastall gravity extension of the standard CDM model: theoretical features and observational constraints
Ozgur Akarsu, Nihan Katirci, Suresh Kumar +3
We present a detailed investigation of the Rastall gravity extension of the standard CDM model. We review the model for two simultaneous modifications of different nature in the…
Graduated dark energy: Observational hints of a spontaneous sign switch in the cosmological constant
Ozgur Akarsu, John D. Barrow, Luis A. Escamilla +1
We study the cosmological constant () in the standard CDM model by introducing the \textit{graduated dark energy} (gDE) characterised by a minimal dynamical deviation from th…
Weak field limit of higher dimensional massive Brans-Dicke gravity: Observational constraints
Ozgur Akarsu, Alexey Chopovsky, Valerii Shulga +2
We consider higher-dimensional massive Brans-Dicke theory with Ricci-flat internal space. The background model is perturbed by a massive gravitating source which is pressureless in…
Anisotropic massive Brans-Dicke gravity extension of the standard CDM model
Ozgur Akarsu, Nihan Katirci, Nese Ozdemir +1
We present an explicit detailed theoretical and observational investigation of an anisotropic massive Brans-Dicke (BD) gravity extension of the standard CDM model, wherein the e…
Constraint on energy-momentum squared gravity from neutron stars and its cosmological implications
Ozgur Akarsu, John D. Barrow, Sercan Çıkıntoğlu +2
Deviations from the predictions of general relativity due to energy-momentum squared gravity (EMSG) are expected to become pronounced in the high density cores of neutron stars. We…