Newest measurements of Hubble constant from DESI 2024 BAO observations

TL;DR

This paper presents a new, data-driven measurement of the Hubble constant using DESI BAO data, achieving high precision and aligning with Planck and TRGB results, but still in tension with SH0ES.

Contribution

The study introduces a purely data-driven method to measure H0 from BAO observations without relying on standard calibrations or sound horizon assumptions.

Findings

H0 measured as 68.4 km/s/Mpc with 1.3% accuracy.

Results agree with Planck and TRGB within 1 sigma.

H0 remains in 4.3 sigma tension with SH0ES.

Abstract

In this Letter, we use the latest results from the Dark Energy Spectroscopic Instrument (DESI) survey to measure the Hubble constant. Baryon acoustic oscillation (BAO) observations released by the DESI survey, allow us to determine $H_0$ from the first principles. Our method is purely data-driven and relies on unanchored luminosity distances reconstructed from SN Ia data and $H(z)$ reconstruction from cosmic chronometers. Thus it circumvents calibrations related to the value of the sound horizon size at the baryon drag epoch or intrinsic luminosity of SN Ia. We find $H_0=68.4^{+1.0}_{-0.8}~{\rm km~s^{-1}~Mpc^{-1}}$ at 68% C.L., which provides the Hubble constant at an accuracy of 1.3% with minimal assumptions. Our assessments of this fundamental cosmological quantity using the BAO data spanning the redshift range $z=0.51-2.33$ agree very well with Planck's results and TRGB results within $1\sigma$. This result is still in a $4.3\sigma$ tension with the results of the Supernova H0 for the Equation of State (SH0ES).