Cosmic expansion parametrization: Implication for curvature and H₀ tension

2021/06/30 by Bikash R. Dinda
Physics and Astronomy · #Anisotropy #Astrophysics #Baryon #Baryon acoustic oscillations #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Curvature #Dark energy #Deceleration parameter #Energy (signal processing) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gamma-ray bursts and supernovae #Geometry #Hubble's law #Lambda #Mathematical physics #Omega #Parametrization (atmospheric modeling) #Particle physics #Physics #Quantum mechanics #Redshift #astro-ph.CO #gr-qc

paper · pdf · doi:10.1103/physrevd.105.063524

published as Physical Review D (Vol. 105, No. 6) 21 March 2022 · 17 pages, 10 figures. Updated a bit. Main results and conclusions are the same

arxiv created 2022/02/07 · openalex publication_date 2022/03/21 · arxiv updated 2022/03/22 · openalex created_date 2022/04/03 · openalex updated_date 2026/08/02

Abstract

We propose an analytical parametrization of the comoving distance and Hubble parameter to study the cosmic expansion history beyond the vanilla ΛCDM model. The parametrization is generalized enough to include the contribution of spatial curvature and to capture the higher redshift behaviors. With this parameterization, we study the late time cosmic behavior and put constraints on the cosmological parameters like present values of Hubble parameter (H₀), matter energy density parameter (Ω_m0), spatial curvature energy density parameter (Ω_k0) and baryonic matter energy density parameter (Ω_b0) using different combinations data like CMB (Cosmic microwave background), BAO (baryon acoustic oscillation), and SN (Pantheon sample for type Ia supernovae). We also rigorously study the Hubble tension in the framework of late time modification from the standard ΛCDM model. We find that the late time modification of the cosmic expansion can solve the Hubble tension between CMB & SHOES (local distance ladder observation for H₀), between CMB+BAO & SHOES and between CMB+SN & SHOES, but the late time modification can not solve the Hubble tension between CMB+BAO+SN and SHOES. That means CMB, BAO, and SN data combined put strong enough constraints on H₀ (even with varying Ω_k0) and on other background cosmological parameters so that the addition of H₀ prior from SHOES (or from similar other local distance observations) can not significantly pull the H₀ value towards the corresponding SHOES value.

Citations

• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• Nonlinear effects of dark energy clustering beyond the acoustic scales
• Galileons in the Sky
• Theoretical Aspects of Massive Gravity
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Revisiting the parametrization of equation of state of dark energy via SNIa data
• Accelerating Universes with Scaling Dark Matter
• Quintessence: A Review
• Dynamics of dark energy
• Baryon acoustic oscillations in the Lyαforest of BOSS DR11 quasars
• The Case for a Positive Cosmological Lambda-term
• Dark energy constraints from the 21~cm intensity mapping surveys with SKA1
• Massive Gravity
• Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory
• The KBC void and Hubble tension contradict ΛCDM on a Gpc scale - Milgromian dynamics as a possible solution
• Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
• On the use of the local prior on the absolute magnitude of Type Ia supernovae in cosmological inference
• In the Realm of the Hubble tension - a Review of Solutions
• Planck 2018 results: VI. Cosmological parameters
• Planck 2015 results. XIII. Cosmological parameters