Modified gravity and cosmology

EN Saridakis, R Lazkoz, V Salzano, PV Moniz… - 2021 - Springer
The dawn of the twenty-first century came with very positive prospects for gravity, cosmology,
and astrophysics. Technological progress made it possible for cosmology to enter to its …

Cosmography in gravity

S Mandal, D Wang, PK Sahoo - Physical Review D, 2020 - APS
Cosmography is an ideal tool to investigate the cosmic expansion history of the Universe in
a model-independent way. The equations of motion in modified theories of gravity are …

Spherically symmetric configuration in gravity

RH Lin, XH Zhai - Physical Review D, 2021 - APS
General relativity can be formulated equivalently with a non-Riemannian geometry that
associates with an affine connection of nonzero nonmetricity Q but vanishing curvature R …

Comparing equivalent gravities: common features and differences

S Capozziello, V De Falco, C Ferrara - The European Physical Journal C, 2022 - Springer
We discuss equivalent representations of gravity in the framework of metric-affine
geometries pointing out basic concepts from where these theories stem out. In particular, we …

Testing F (Q) gravity with redshift space distortions

BJ Barros, T Barreiro, T Koivisto, NJ Nunes - Physics of the Dark Universe, 2020 - Elsevier
A Bayesian statistical analysis using redshift space distortions data is performed to test a
model of Symmetric Teleparallel Gravity where gravity is non-metrical. The cosmological …

ADM formulation and Hamiltonian analysis of gravity

K Hu, T Katsuragawa, T Qiu - Physical Review D, 2022 - APS
f (Q) gravity is an extension of the symmetric teleparallel equivalent to general relativity. We
demonstrate the Hamiltonian analysis of f (Q) gravity with fixing the coincident gauge …

[HTML][HTML] A class of static spherically symmetric solutions in f (Q)-gravity

M Calzá, L Sebastiani - The European Physical Journal C, 2023 - Springer
We analyze a class of topological static spherically symmetric vacuum solutions in f (Q)-
gravity. We considered an Ansatz ensuring that those solutions trivially satisfy the field …

Exploring physical properties of minimally deformed strange star model and constraints on maximum mass limit in f (𝒬) gravity

SK Maurya, G Mustafa, M Govender… - Journal of Cosmology …, 2022 - iopscience.iop.org
Our current investigation is inherently linked to the observations of gravitational waves from
the GW190814 event which suggests that the source of the signals can be ascribed to a …

Twin peak quasi‐periodic oscillations and stability via thin‐shell formalism of traversable wormholes in symmetric teleparallel gravity

G Mustafa, X Gao, F Javed - Fortschritte der Physik, 2022 - Wiley Online Library
This article explores the wormhole geometry in the background of symmetric teleparallel
gravity or f (Q) f(Q) gravity, where QQ is the non‐metricity term, and definite subject for the …

Impact of f (Q) gravity on anisotropic compact star model and stability analysis

P Bhar, A Malik, A Almas - Chinese Journal of Physics, 2024 - Elsevier
The aim of this study is to explore the relativistic anisotropic configuration of a hybrid star in
the proximity of strange quark matter and normal baryonic matter within the context of f (Q) …