454 citations · 955 across the 12 of their papers we have counts for
12 papers
Revisiting CPL with sign-switching density: To cross or not to cross the NECB
Mine Gökçen, Özgür Akarsu, Eleonora Di Valentino
Recent DESI DR2 BAO measurements, when combined with CMB and SNeIa data, exhibit a - preference for dynamical dark energy (DE) described by the CPL-parametrized equatio…
Further support for increasing with effective redshift
Özgür Akarsu, Eoin Ó Colgáin, Anjan A. Sen +1
In Adil et al. 2023, we reported an increasing trend in with effective redshift based on constraints over the redshift range $0 \lesssim z \less…
Do we need wavelets in the late Universe?
Luis A. Escamilla, Emre Özülker, Özgür Akarsu +2
We parameterize the Hubble function by adding Hermitian wavelets to the Hubble radius of CDM. This allows us to build Hubble functions that oscillate around CDM at late times…
Simple-graduated dark energy and spatial curvature
Giovanni Acquaviva, Ozgur Akarsu, Nihan Katirci +1
In this work, we first discuss the possibility that dark energy models with negative energy density values in the past can alleviate the tension, as well as the discrepancy w…
Screening anisotropy via energy-momentum squared gravity: CDM model with hidden anisotropy
Ozgur Akarsu, John D. Barrow, N. Merve Uzun
We construct a generalization of the standard CDM model, wherein we simultaneously replace the spatially flat Robertson-Walker metric with its simplest anisotropic generalizatio…
Cosmology Intertwined IV: The Age of the Universe and its Curvature
Eleonora Di Valentino, Luis A. Anchordoqui, Ozgur Akarsu +88
A precise measurement of the curvature of the Universe is of primeval importance for cosmology since it could not only confirm the paradigm of primordial inflation but also help in…
Cosmology Intertwined III: and
Eleonora Di Valentino, Luis A. Anchordoqui, Ozgur Akarsu +89
The standard Cold Dark Matter cosmological model provides a wonderful fit to current cosmological data, but a few tensions and anomalies became statistically significant with t…
Cosmology Intertwined I: Perspectives for the Next Decade
Eleonora Di Valentino, Luis A. Anchordoqui, Ozgur Akarsu +89
The standard Cold Dark Matter cosmological model provides an amazing description of a wide range of astrophysical and astronomical data. However, there are a few big open quest…
Constraints on a Bianchi type I spacetime extension of the standard CDM model
Ozgur Akarsu, Suresh Kumar, Shivani Sharma +1
We consider the simplest anisotropic generalization, as a correction, to the standard CDM model, by replacing the spatially flat Robertson-Walker metric by the Bianchi type-I me…
Screening in a new modified gravity model
Ozgur Akarsu, John D. Barrow, Charles V. R. Board +2
We study a new model of Energy-Momentum Squared Gravity (EMSG), called Energy-Momentum Log Gravity (EMLG), constructed by the addition of the term $f(T_{μν}T^{μν})=α\ln(λ\,T_{μν}T^…
Scalar perturbations in cosmological models: the cosmic screening approach
Ozgur Akarsu, Ruslan Brilenkov, Maxim Eingorn +2
We investigate cosmological perturbations for nonlinear models within the cosmic screening approach. Matter is considered both in the form of a set of discrete point-like ma…
Are dark energy models with variable EoS parameter compatible with the late inhomogeneous Universe?
Ozgur Akarsu, Mariam Bouhmadi-López, Maxim Brilenkov +3
We study the late-time evolution of the Universe where dark energy (DE) is presented by a barotropic fluid on top of cold dark matter (CDM). We also take into account the radiation…