2025/07/09 by Lázaro L. Sales, Sales, Lázaro L., K. E. L. de Farias +16
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #GNSS positioning and interference #Geophysics and Gravity Measurements #Pulsars and Gravitational Waves Research
paper · pdf · doi:10.48550/arxiv.2507.06975
openalex publication_date 2025/07/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
In this study, we use late-time probes, such as well-localized fast radio bursts (FRBs), baryon acoustic oscillations (BAO), supernovae (SNe), and cosmic chronometers (CC) to constrain cosmological parameters through a model-independent cosmographic approach. By integrating FRB data with BAO from DESI DR2, SNe, and CC, we derive constraints on the Hubble constant (H0), the deceleration parameter (q0), and the jerk parameter (j0), using Markov Chain Monte Carlo (MCMC) analysis for parameter estimation. The cosmographic approach with FRBs alone provides H0 = 66.35+4.13-5.04 km s-1 Mpc-1, q0 = -0.33+0.21-0.15, and j0 = 0.83+0.57-0.67, corresponding to a precision of ∼ 6% for the Hubble constant and showing consistency with the ΛCDM expectation. The DESI+CMB dataset yields H0 = 65.59+1.25-1.24 km s-1 Mpc-1, q0 = -0.29+0.07-0.08, and j0 = 0.58+0.03-0.04, providing a ∼ 2% precision on H0 and may suggest a possible tension in the late-time kinematic sector relative to the ΛCDM expectation when BAO measurements are calibrated with a Planck-inferred sound horizon. Combining the FRB, SNe, DESI+CMB, and CC datasets further tightens the constraints to H0 = 68.03+0.53-0.52 km s-1 Mpc-1, q0 = -0.41 ± 0.02, and j0 = 0.55 ± 0.02, with the jerk parameter remaining lower than j0 = 1 at the 1σ confidence level. These findings hint at a possible late-time kinematic tension, as indicated by the inferred value of the jerk parameter, which is primarily driven by the DESI+CMB dataset under standard early-Universe assumptions for the sound horizon.