THE 1% CONCORDANCE HUBBLE CONSTANT

By C. Bennett, D. Larson, J. Weiland, G. University, U. Columbia. 2014

241 citations recorded by the source corpus.

The determination of the Hubble constant has been a central goal in observational astrophysics for nearly a hundred years. Extraordinary progress has occurred in recent years on two fronts: the cosmic distance ladder measurements at low redshift and cosmic microwave background (CMB) measurements at high redshift. The CMB is used to predict the current expansion rate through a best-fit cosmological model. Complementary progress has been made with baryon acoustic oscillation (BAO) measurements at relatively low redshifts. While BAO data do not independently determine a Hubble constant, they are important for constraints on possible solutions and checks on cosmic consistency. A precise determination of the Hubble constant is of great value, but it is more important to compare the high and low redshift measurements to test our cosmological model. Significant tension would suggest either uncertainties not accounted for in the experimental estimates or the discovery of new physics beyond the standard model of cosmology. In this paper we examine in detail the tension between the CMB, BAO, and cosmic distance ladder data sets. We find that these measurements are consistent within reasonable statistical expectations and we combine them to determine a best-fit Hubble constant of 69.6 ± 0.7 km s−1 Mpc−1. This value is based upon WMAP9+SPT+ACT+6dFGS+BOSS/DR11+H0/Riess; we explore alternate data combinations in the text. The combined data constrain the Hubble constant to 1%, with no compelling evidence for new physics.

Subfields: Astronomy and Astrophysics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/817a0752ad24b444ee03aa196392309cff8932b9

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Statistical and Nonlinear Physics

Citations in the corpus

A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT (2016, methodology): “…al. (2011), Sorce et al. (2012), Freedman et al. (2012), and Suyu et al. (2013) have been widely considered and in some cases revisited in great detail (Bennett et al. 2014; * Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which…”
QUANTIFYING DISCORDANCE IN THE 2015 PLANCK CMB SPECTRUM (2015, methodology): “…BAO scale measurement from the Baryon Oscillation Spectroscopic Survey (BOSS) ‘CMASS’ galaxy sample at an effective z = 0.57 (An- derson et al. 2014) and the most precise local distance ladder constraint on the Hubble constant, H0 = 73.0 ± 2.4 km s−1 Mpc−1 (Riess et al. 2011; Bennett et al. 2014).”
CONFIRMATION OF A STAR FORMATION BIAS IN TYPE Ia SUPERNOVA DISTANCES AND ITS EFFECT ON THE MEASUREMENT OF THE HUBBLE CONSTANT (2014, background): “(See Bennett et al. 2014 for a discussion of this tension and its consequences for cosmology.)”
Dark Energy Survey Year 1 Results: A Precise H0 Estimate from DES Y1, BAO, and D/H Data (2017, result): “Broadly speaking, our results and conclusions mirror and update those of Bennett et al. (2014), who pursued an examination similar to this work.”
Planck2015 results (2015, unknown): “Finally, we note that in a recent analysis Bennett et al. (2014) derive a “concordance” value of H0 = (69.6±0.7) km s−1Mpc−1 for base ΛCDM by combining WMAP9+SPT+ACT+BAO with a slightly revised version of the R11 H0 value, (73.0 ± 2.4) km s−1Mpc−1.”
Science with the space-based interferometer eLISA. III: probing the expansion of the universe using gravitational wave standard sirens (2016, unknown): “the discussions in [96] and in [100]).”