310 citations · 1k across the 14 of their papers we have counts for
15 papers
New models and Big Bang Nucleosynthesis constraints in gravity
Fotios K. Anagnostopoulos, Viktor Gakis, Emmanuel N. Saridakis +1
The theories of modified gravity arise from the consideration of non-metricity as the basic geometric quantity, and have been proven to be very efficient in describing the l…
Swiss-cheese cosmologies with variable and from the renormalization group
Fotios K. Anagnostopoulos, Alfio Bonanno, Ayan Mitra +1
A convincing explanation for the nature of the dark energy and dark matter is still missing. In recent works a RG-improved swiss-cheese cosmology with an evolving cosmological cons…
Observational constraints on soft dark energy and soft dark matter: challenging CDM
Emmanuel N. Saridakis, Weiqiang Yang, Supriya Pan +2
Soft cosmology is an extension of standard cosmology allowing for a scale-dependent equation-of-state (EoS) parameter in the dark sectors, which is one of the properties of soft ma…
First evidence that non-metricity f(Q) gravity could challenge CDM
Fotios K. Anagnostopoulos, Spyros Basilakos, Emmanuel N. Saridakis
We propose a novel model in the framework of gravity, which is a gravitational modification class arising from the incorporation of non-metricity. The model has General Rela…
IR quantum gravity solves naturally cosmic acceleration and its coincidence problem
Fotios K. Anagnostopoulos, Georgios Kofinas, Vasilios Zarikas
The novel idea is that the undergoing accelerated expansion of the universe happens due to infrared quantum gravity modifications at intermediate astrophysical scales of galaxies o…
Observational constraints on Myrzakulov gravity
Fotios K. Anagnostopoulos, Spyros Basilakos, Emmanuel N. Saridakis
We use data from Supernovae (SNIa) Pantheon sample, from Baryonic Acoustic Oscillations (BAO), and from cosmic chronometers measurements of the Hubble parameter (CC), alongside arg…
Observational constraints on Barrow holographic dark energy
Fotios K. Anagnostopoulos, Spyros Basilakos, Emmanuel N. Saridakis
We use observational data from Supernovae (SNIa) Pantheon sample, as well as from direct measurements of the Hubble parameter from the cosmic chronometers (CC) sample, in order to…
Studying Lagrangian theories with machine learning: a toy model
Christos Valelis, Fotios K. Anagnostopoulos, Spyros Basilakos +1
The existence or not of pathologies in the context of Lagrangian theory is studied with the aid of Machine Learning algorithms. Using an example in the framework of classical mecha…
Bayesian analysis of gravity using data
Fotios K. Anagnostopoulos, Spyros Basilakos, Emmanuel N. Saridakis
We use observational data from Supernovae (SNIa) Pantheon sample, from direct Hubble constant measurements with cosmic chronometers (CC), from the Cosmic Microwave Background shift…
Dark energy and dark matter unification from dynamical space time: observational constraints and cosmological implications
Fotios K. Anagnostopoulos, David Benisty, Spyros Basilakos +1
A recently proposed Dynamical Space-time Cosmology (DSC) that unifies dark energy and dark matter is studied. The general action of this scenario includes a Lagrange multiplier, wh…
Growth index of matter perturbations in the light of Dark Energy Survey
Spyros Basilakos, Fotios K. Anagnostopoulos
We study how the cosmological constraints from growth data are improved by including the measurements of bias from Dark Energy Survey (DES). In particular, we utilize the biasing p…
Constraining the Asymptotically Safe Cosmology: cosmic acceleration without dark energy
Fotios K. Anagnostopoulos, Spyros Basilakos, Georgios Kofinas +1
A recently proposed Asymptotically Safe cosmology provides an elegant mechanism towards understanding the nature of dark energy and its associated cosmic coincidence problem. The u…
Holographic dark energy through Tsallis entropy
Emmanuel N. Saridakis, Kazuharu Bamba, R. Myrzakulov +1
In order to apply holography and entropy relations to the whole universe, which is a gravitational and thus nonextensive system, for consistency one should use the generalized defi…
Updated constraints on models using direct and indirect measurements of the Hubble parameter
S. Basilakos, S. Nesseris, F. K. Anagnostopoulos +1
We extract observational constraints on gravity, using the recently proposed statistical method which is not affected by the value of and thus it bypasses the problem…
Constraining the dark energy models with H(z) data: an approach independent of
Fotios Anagnostopoulos, Spyros Basilakos
We study the performance of the latest data in constraining the cosmological parameters of different cosmological models, including that of Chevalier-Polarski-Linder $w_{0}w…