198 citations · 1.8k across the 47 of their papers we have counts for
3 papers · 1 filter
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…