H0LiCOW - V. New COSMOGRAIL time delays of HE 0435-1223: H0 to 3.8 per cent precision from strong lensing in a flat ΛCDM model

By Vivien Bonvin, F. Courbin, Sherry H. Suyu, P. J. Marshall, C. Rusu, Dominique Sluse, M. Tewes, Kenneth C. Wong, T. Collett, C. Fassnacht and 8 more. 2016

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We present a new measurement of the Hubble Constant H-0 and other cosmological parameters based on the joint analysis of three multiply imaged quasar systems with measured gravitational time delays. First, we measure the time delay of HE 0435-1223 from 13-yr light curves obtained as part of the COSMOGRAIL project. Companion papers detail the modelling of the main deflectors and line-of-sight effects, and how these data are combined to determine the time-delay distance of HE 0435-1223. Crucially, the measurements are carried out blindly with respect to cosmological parameters in order to avoid confirmation bias. We then combine the time-delay distance of HE 0435-1223 with previous measurements from systems B1608+656 and RXJ1131-1231 to create a Time Delay Strong Lensing probe (IDSL). In flat A cold dark matter (ACDM) with free matter and energy density, we find H-0 = 71.9(-3.0)(+2.4) km s(-1) Mpc(-1) and Omega(Lambda) = 0.62(-0.35)(+0.24) This measurement is completely independent of, and in agreement with, the local distance ladder measurements of H-0. We explore more general cosmological models combining TDSL with other probes, illustrating its power to break degeneracies inherent to other methods. The joint constraints from IDSL and Planck are H-0 = 69.2(-2.2)(+1.4) km s(-1) Mpc(-1), Omega(Lambda) = 0.70(-0.01)(+0.01) and Omega(k) = 0.003(-0.006)(+0.004) in open ACDM and H-0 = 79.0(-4.2)(+4.4) km s(-1) Mpc(-1), Omega(de) = 0.77(-0.03)(+0.02) and w = -1.38(-0.16)(+0.14) in flat wCDM. In combination with Planck and baryon acoustic oscillation data, when relaxing the constraints on the numbers of relativistic species we find N-eff = 3.34(-0.21)(+0.21) in N-eff Lambda CDM and when relaxing the total mass of neutrinos we find Sigma rn(nu) <= 0.182 eV in m(nu) Lambda CDM. Finally, in an open wCDM in combination with Planck and cosmic microwave background lensing, we find H-0 = 77.9(-4.2)(+5.0) km s(-1) Mpc(-1), Omega(de) = 0.77(-0.03)(+0.03), Omega(k) = -0.003(-0.004)(+0.004) and w = -1.37(-0.23)(+0.18).

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/6b1b3eb6bba65b09c00fa987ea8ef4bae89aac0c

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Citations in the corpus

Elucidating ΛCDM: Impact of Baryon Acoustic Oscillation Measurements on the Hubble Constant Discrepancy (2017, background): “…& Astronomy, The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218-2686 2 Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada tent with the distance ladder, and in mild tension with Planck (Bonvin et al. 2017).”
New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant (2018, background): “Indeed, replacing the entire distance ladder with another local universe distance estimator, time delays from strong gravitational lensing, confirms and reinforces the discrepancy with H0=72.8±2.4 km s −1Mpc−1 for realistic values of ΩM (Bonvin et al. 2017).”
Dark Energy Survey Year 1 Results: A Precise H0 Estimate from DES Y1, BAO, and D/H Data (2017, methodology): “…a flat CDM model of minimal neutrino mass; SPTpol measurements of H0 in the same cosmological model; the local supernovae-based distance ladder measurement of H0 from the SH0ES collaboration (Riess et al. 2018); and the H0LiCOW measurement using multiply imaged quasars from Bonvin et al. (2017).”
Measuring the Hubble constant with Type Ia supernovae as near-infrared standard candles (2017, background): “0.5; e.g., Riess et al. 2009, 2011; Freedman et al. Send offprint requests to: S. Dhawan 2012; Suyu et al. 2013; Bonvin et al. 2017), along with recent progress in CMB measurements (Bennett et al. 2013; Hinshaw et al. 2013; Planck Collaboration et al. 2016a) hint at mild tension (2–2.5σ) between…”
Measuring Dark Energy Properties with Photometrically Classified Pan-STARRS Supernovae. II. Cosmological Parameters (2017, background): “When H0 priors are omitted, all measurements of H0 are inconsistent with Riess et al. (2016) at the ∼2-3σ level and would also be inconsistent with other local measurements of H0 (Bonvin et al. 2017; Jang & Lee 2017).”