Alleviating the H0 tension in Rastall gravity
2025/08/26 by Mohebi, R., Golanbari, Kh. Saaidi T., Karami, K.
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc)
paper · doi:10.48550/arxiv.2508.20129
Abstract
The tension between measurements of the Hubble constant H0 locally and the value inferred from Planck satellite have provided a strong motivation to explore theoretical frameworks beyond the standard cosmological model (ΛCDM). To this aim, we investigate the H0 tension in the Rastall ΛCDM model (R-ΛCDM), formulated within the Rastall gravity framework as a phenomenological extension of General Relativity featuring a non-conserved energy-momentum tensor. To constrain the cosmological parameters, we employ a comprehensive combined dataset including Big Bang Nucleosynthesis (BBN), Hubble parameter H(z), Type Ia supernovae (SNe Ia), Baryon Acoustic Oscillations (BAO), Cosmic Microwave Background (CMB) anisotropies, and the growth rate of cosmic structures f(z)σ8(z). The estimation of model parameters is performed via Markov Chain Monte Carlo (MCMC) sampling within a Bayesian statistical framework. Our results show that the R-ΛCDM model, especially in closed geometry, reduces the H0 tension, bringing the discrepancy with the local SH0ES measurements down to 1.97σ to 2.18σ. However, the tension related to the σ8 parameter remains unresolved.
Citations
- Power Law Plateau Inflation and Primary Gravitational Waves in the light of ACT
- Starobinsky like inflation and EGB Gravity in the light of ACT
- The Atacama Cosmology Telescope: DR6 Constraints on Extended Cosmological Models
- DESI DR2 Results I: Baryon Acoustic Oscillations from the Lyman Alpha Forest
- DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
- Extended Dark Energy analysis using DESI DR2 BAO measurements
- DESI 2024 V: Full-Shape Galaxy Clustering from Galaxies and Quasars
- The Dark Energy Survey Supernova Program: Cosmological Analysis and Systematic Uncertainties
- Exploring new subclass of k-inflation: tachyon inflation in R+ηT gravity model
- Hamilton-Jacobi analysis of noncanonical inflation in f(R, T) gravity: Constraints from Planck/ACT data, and theoretical bounds
- Tsallis holographic inflation in f(R,T) gravity: CMB constraints, reheating, and swampland implications
- Constant-roll inflation driven by holographic dark energy
- The Pantheon+ Analysis: Cosmological Constraints
- A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
- Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
- Cosmology Intertwined II: The Hubble Constant Tension
- Brane inflation: swampland criteria, TCC, and reheating predictions
- The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch
- Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
- SUPERNOVA CONSTRAINTS AND SYSTEMATIC UNCERTAINTIES FROM THE FIRST THREE YEARS OF THE SUPERNOVA LEGACY SURVEY
- Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
- Solar System Constraints on f(G) Dark Energy
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- A new inflationary universe scenario: A possible solution of the horizon, flatness, homogeneity, isotropy and primordial monopole problems
- A new type of isotropic cosmological models without singularity
- Mach's Principle and a Relativistic Theory of Gravitation
Related