HUBBLE PARAMETER MEASUREMENT CONSTRAINTS ON THE REDSHIFT OF THE DECELERATION–ACCELERATION TRANSITION, DYNAMICAL DARK ENERGY, AND SPACE CURVATURE

By Omer Farooq, Foram Madiyar, Sara Crandall, Bharat Ratra. 2016

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We compile an updated list of 38 measurements of the Hubble parameter H(z) between redshifts 0.07 ≤ z ≤ 2.36 and use them to place constraints on model parameters of constant and time-varying dark energy cosmological models, both spatially flat and curved. We use five models to measure the redshift of the cosmological deceleration–acceleration transition, zda, from these H(z) data. Within the error bars, the measured zda are insensitive to the model used, depending only on the value assumed for the Hubble constant H0. The weighted mean of our measurements is zda = 0.72 ± 0.05 (0.84 ± 0.03) for H0 = 68 ± 2.8 (73.24 ± 1.74) km s−1 Mpc−1 and should provide a reasonably model-independent estimate of this cosmological parameter. The H(z) data are consistent with the standard spatially flat ΛCDM cosmological model but do not rule out nonflat models or dynamical dark energy models.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/901d77ff3788334427b426734c5c655dd8b1aaf6

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In Astronomy and Astrophysics

Citations in the corpus

Hubble Parameter and Baryon Acoustic Oscillation Measurement Constraints on the Hubble Constant, the Deviation from the Spatially Flat ΛCDM Model, the Deceleration–Acceleration Transition Redshift, and Spatial Curvature (2017, methodology): “In addition, we note that some other local expansion rate measurements find a slightly 7 We note that lower z parts of earlier compilations of H(z) data have been shown to not be inconsistent with Gaussianity and so probably consistent with the GP method requirement of Gaussianity (Farooq et al. 201”
The Cardassian expansion revisited: constraints from updated Hubble parameter measurements and type Ia supernova data (2017, background): “…measurements, for instance Anderson et al. (2014) take 153.19 Mpc while Gaztanaga et al. (2009) choose 153.3 Mpc, etc. Table 1 shows an updated compilation of OHD accumulating a total of 51 points (other recent compilations are provided by Farooq et al. 2017; Zhang & Xia 2016; Yu & Wang 2016).”