2025ApJ...982...71Y -
Astrophys. J., 982, 71 (2025/April-1)
Revisiting the Hubble Constant, Sound Horizon, and Cosmography from Late-time Universe Observations.
YANG Z., LIU T. and LI X.
Abstract (from CDS):
The Hubble tension has become one of the central problems in cosmology. In this work, we determine the Hubble constant H0 and sound horizon rd by using the combination of baryon acoustic oscillations (BAOs) from DESI surveys, time-delay lensed quasars from H0LiCOW collaborations, and the Pantheon supernova (SN) observations. We consider two cosmological approaches, i.e., Taylor series and Padé polynomials, to avoid cosmological dependence. The reason for using this combination of data is that the absolute distance provided by strong gravitational lensing helps anchor the relative distance of BAOs, and SNe provide a robust history of Universe evolution. Combining the six time-delay distance (6DΔt) plus four angular diameter distance to the deflector (4Dd) measurements of time-delay lensed quasars, the BAOs, and the Type Ia SN data sets, we obtain a model-independent result of ${r}_{d}=138.{2}_{-3.9}^{+3.3}$ Mpc and ${H}_{0}=72.{9}_{-1.8}^{+1.8}\,\,{\rm{km}}\,{{\rm{s}}}^{-1}\,{{\rm{Mpc}}}^{-1}$ for the Taylor series cosmography and ${r}_{d}=137.{0}_{-3.7}^{+3.2}$ Mpc and ${H}_{0}=73.{1}_{-1.7}^{+1.8}\,\,{\rm{km}}\,{{\rm{s}}}^{-1}\,{{\rm{Mpc}}}^{-1}$ for the Padé polynomial cosmography. The determination of rd and H0 prefers larger H0 and smaller rd than Planck data under the assumption of a flat Lambda cold dark matter model. However, the values of H0 are consistent with the H0 determination from the SH0ES collaboration.
Abstract Copyright:
© 2025. The Author(s). Published by the American Astronomical Society.
Journal keyword(s):
Observational cosmology - Cosmological parameters
Simbad objects:
7
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