- Letter
Model-independent late-Universe measurements of and with the parametrization based on cosmic age-improved inverse distance ladder
Phys. Rev. D 114, L041304 – Published 20 August, 2026
DOI: https://doi.org/10.1103/rl22-1dyx
Abstract
The standard -cold dark matter model has encountered serious challenges and the tension has become more significant with increasingly precise cosmological observations. Meanwhile, inconsistencies in measurements of the curvature parameter 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 and by utilizing the inverse distance ladder (IDL). To construct the PAge-improved IDL, we utilize the strong gravitational lensing (SGL), cosmic chronometers (CCs), and -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 in the MAPAge model, reducing the tension to the level. Extending to the model, we obtain , 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 .