English

Determining the Hubble constant from Hubble parameter measurements

Cosmology and Nongalactic Astrophysics 2017-01-26 v2

Abstract

We use 28 Hubble parameter, H(z)H(z), measurements at intermediate redshifts 0.07z2.30.07 \leq z \leq 2.3 to determine the present-day Hubble constant H0H_0 in four cosmological models. We measure H0=68.32.6+2.7,68.43.3+2.9,65.06.6+6.5H_0 = 68.3^{ +2.7}_{ -2.6 }, 68.4^{ +2.9 }_{ -3.3 }, 65.0^{ +6.5 }_{ -6.6 } and 67.92.4+2.4 67.9^{ +2.4}_{-2.4} km s1{}^{-1} Mpc1{}^{-1} (1σ\sigma errors) in the Λ\LambdaCDM (spatially flat and non-flat), ω\omegaCDM and ϕ\phiCDM models, respectively. These measured H0H_0 values are more consistent with the lower values determined from recent cosmic microwave background and baryon acoustic oscillation data, as well as with that found from a median statistics analysis of Huchra's compilation of H0H_0 measurements,but include the higher local measurements of H0H_0 within the 2σ\sigma confidence limits.

Keywords

Cite

@article{arxiv.1606.07316,
  title  = {Determining the Hubble constant from Hubble parameter measurements},
  author = {Yun Chen and Suresh Kumar and Bharat Ratra},
  journal= {arXiv preprint arXiv:1606.07316},
  year   = {2017}
}

Comments

5 pages, 5 figures, 1 table; accepted for publication in ApJ

R2 v1 2026-06-22T14:32:38.205Z