Cosmological constraints on gravity models in the non-coincident formalism
arXiv:2410.00922 · doi:10.1016/j.jheap.2024.08.002
Abstract
The article investigates cosmological applications of theories in a non-coincident formalism. We explore a new theory dynamics utilizing a non-vanishing affine connection involving a non-constant function , resulting in Friedmann equations that are entirely distinct from those of theory. In addition, we propose a new parameterization of the Hubble function that can consistently depicts the present deceleration parameter value, transition redshift, and the late time de-Sitter limit. We evaluate the predictions of the assumed Hubble function by imposing constraints on the free parameters utilizing Bayesian statistical analysis to estimate the posterior probability by employing the CC, Pantheon+SH0ES, and the BAO samples. Moreover, we conduct the AIC and BIC statistical evaluations to determine the reliability of MCMC analysis. Further, we consider some well-known corrections to the STEGR case such as an exponentital correction, logarithmic correction, and a power-law correction and then we find the constraints on the parameters of these models via energy conditions. Finally, to test the physical plausibility of the assumed models we conduct the thermodynamical stability analysis via the sound speed parameter.
Journal of High Energy Astrophysics published version
References in corpus (23)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
- Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
- The Pantheon+ Analysis: The Full Dataset and Light-Curve Release
- Teleparallel Gravity: From Theory to Cosmology
- Cosmological solutions and growth index of matter perturbations in gravity
- First evidence that non-metricity f(Q) gravity could challenge CDM
- Wormhole geometries in gravity and the energy conditions
- Can gravity challenge CDM?
- Physical Characteristics and Maximum Allowable Mass of Hybrid Star in the Context of Gravity
- Cosmic acceleration and energy conditions in CDM symmetric teleparallel gravity
- Cosmological Inflation in f(Q, T) Gravity
- Isotropization of locally rotationally symmetric Bianchi-I universe in -gravity
- A new parametrization of Hubble parameter in gravity
- Reconstructing isotropic and anisotropic cosmologies
- Cosmological observational constraints on the power law type modified gravity theory
- Buchdahl quark stars within theory
- Phase-space analysis of a novel cosmological model in theory
- Geodesic Deviation Equation In -Gravity
- How different connections in flat FLRW geometry impact energy conditions in theory?
- AdS black hole thermodynamics and microstructures from gravitation
- Diagnostic and Comparative Analysis of Dark Energy Models with Parametrizations
- Friedmann-like universes with non-metricity