Dark energy in light of the early JWST observations: case for a negative cosmological constant?

SA Adil, U Mukhopadhyay, AA Sen… - Journal of Cosmology …, 2023 - iopscience.iop.org
Early data from the James Webb Space Telescope (JWST) has uncovered the existence of a
surprisingly abundant population of very massive galaxies at extremely high redshift, which …

FLRW cosmology in Weyl type f (Q) gravity and observational constraints

GK Goswami, R Rani, JK Singh, A Pradhan - Journal of High Energy …, 2024 - Elsevier
Inspired by various works in a Weyl type f (Q) gravity to reduce some serious problems in
General Relativity Theory (GR), we develop a model of the universe in a Weyl type f (Q) …

The consequence of higher-order curvature-based constraints on f (R, Lm) gravity

JK Singh, A Singh, H Balhara, JRL Santos - Annals of Physics, 2024 - Elsevier
In this investigation, we perform an observational statistical analysis in the theory of f (R, L
m) gravity. The proposed theoretical model is based on the Ricci scalar's non-linear …

Evolution of the Universe with quintessence model in Rastall gravity

JK Singh, A Singh, SG Ghosh, SD Maharaj - Physica Scripta, 2024 - iopscience.iop.org
We investigate the Universe's evolution within the framework of Rastall gravity, which is an
extension of the standard ΛCDM model. Utilizing a linear parametrization of the Equation of …

Study of pressure parametric dark energy model in the framework of gravity

S Goswami, S Das - International Journal of Modern Physics D, 2024 - World Scientific
In this work, we have proposed a simple parametrization for the pressure component p (z) of
the dark energy model and have studied the cosmological implications of this model in the …

[HTML][HTML] Observational Constraints and Cosmographic Analysis of f(T,TG) Gravity and Cosmology

H Balhara, JK Singh, Shaily, EN Saridakis - Symmetry, 2024 - mdpi.com
We perform observational confrontation and cosmographic analysis of f (T, TG) gravity and
cosmology. This higher-order torsional gravity is based on both the torsion scalar, as well as …

Cosmic observation of a model in the horizon of -gravity

JK Singh, M Tyagi, JRL Santos - arXiv preprint arXiv:2411.00032, 2024 - arxiv.org
We develop a cosmological model in $ f (Q, C) $ gravity within the framework of symmetric
teleparallel geometry. In addition to the non-metricity scalar $ Q $, our formulation includes …

Dark Energy: A Dynamical Systems Approach to the Reconstruction of the Equation of State

B Osano - arXiv preprint arXiv:2409.07053, 2024 - arxiv.org
This correspondence delves into the application of dynamical systems methodologies within
the context of cosmology, specifically addressing a preliminary strategy for determining the …

[PDF][PDF] Shaily; Saridakis, EN Observational Constraints and Cosmographic Analysis of f (T, TG) Gravity and Cosmology. Symmetry 2024, 16, 1299

H Balhara, JK Singh - 2024 - inspirehep.net
We perform observational confrontation and cosmographic analysis of f (T, TG) gravity and
cosmology. This higher-order torsional gravity is based on both the torsion scalar, as well as …