Hubble Parameter and Baryon Acoustic Oscillation Measurement Constraints on the Hubble Constant, the Deviation from the Spatially-Flat cdm Model, The Deceleration-Acceleration Transition Redshift, and Spatial Curvature
arXiv:1711.03437 · doi:10.3847/1538-4357/aab0a2
Abstract
We compile a complete collection of reliable Hubble parameter data to redshift and use them with the Gaussian Process method to determine continuous functions for various data subsets. From these continuous 's, summarizing across the data subsets considered, we find , more consistent with the recent lower values determined using a variety of techniques. In most data subsets, we see a cosmological deceleration-acceleration transition at 2 significance, with the data subsets transition redshifts varying over at 1 significance. We find that the flat-CDM model is consistent with the data to a of 1.5 to 2.0, depending on data subset considered, with 2 deviations from flat-CDM above this redshift range. Using the continuous with baryon acoustic oscillation distance-redshift observations, we constrain the current spatial curvature density parameter to be , consistent with a flat universe, but the large error bar does not rule out small values of spatial curvature that are now under debate.
17 pages, 5 figures, version published in ApJ
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