Determining the Hubble Constant From Hubble Parameter Measurements

Abstract We use 28 measurements of the Hubble parameter, H ( z ), at intermediate redshifts to determine the present-day Hubble constant H 0 in four cosmological models. We measure , and Mpc −1 (1 σ errors) in the ΛCDM (spatially flat and non-flat), ω CDM, and ϕ CDM models, respectively. These measured H 0 values are more consistent with the lower values determined from recent data on the cosmic microwave background and baryon acoustic oscillations, as well as with the value found from a median statistical analysis of Huchra’s compilation of H 0 measurements, but include the higher local measurements of H 0 within the 2 σ confidence limits.