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  • Letter

Model-independent late-Universe measurements of H0 and ΩK with the parametrization based on cosmic age-improved inverse distance ladder

Guo-Hong Du1, Tian-Nuo Li1, Jia-Le Ling2, Yan-Hong Yao3, Jing-Fei Zhang1, and Xin Zhang1,4,5,*

  • 1Liaoning Key Laboratory of Cosmology and Astrophysics, College of Sciences, Northeastern University, Shenyang 110819, China
  • 2Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 3Institute of Fundamental Physics and Quantum Technology, Department of Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China
  • 4MOE Key Laboratory of Data Analytics and Optimization for Smart Industry, Northeastern University, Shenyang 110819, China
  • 5National Frontiers Science Center for Industrial Intelligence and Systems Optimization, Northeastern University, Shenyang 110819, China

  • *Contact author: zhangxin@neu.edu.cn

Phys. Rev. D 114, L041304 – Published 20 August, 2026

DOI: https://doi.org/10.1103/rl22-1dyx

Abstract

The standard Λ-cold dark matter model has encountered serious challenges and the H0 tension has become more significant with increasingly precise cosmological observations. Meanwhile, inconsistencies in measurements of the curvature parameter ΩK between different datasets also have emerged. In this Letter, we employ two global and cosmic age-based parametrizations, a parametrization based on cosmic age (PAge) and a more accurate parameterization based on cosmic age (MAPAge), to perform model-independent measurements of the Hubble constant H0 and ΩK by utilizing the inverse distance ladder (IDL). To construct the PAge-improved IDL, we utilize the strong gravitational lensing (SGL), cosmic chronometers (CCs), and γ-ray burst (GRB) data to calibrate the latest Dark Energy Spectroscopic Instrument (DESI) second data release baryon acoustic oscillation and Dark Energy Survey (DES) year 5 or DES-Dovekie type Ia supernova data. Our analysis indicates that DESI+DES-Dovekie+SGL+CC+GRB gives H0=72.20±1.00  km s−1 Mpc−1 in the MAPAge model, reducing the H0 tension to the 0.6σ level. Extending to the MAPAge+ΩK model, we obtain ΩK=0.005±0.037, which suggests that current late-time data are consistent with a flat universe. Finally, the Bayesian analysis indicates that the present late-Universe data provide weak to moderate evidence in favor of PAge and MAPAge relative to ΛCDM.

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