Edinburgh Research Explorer

Dark Energy Survey Year 1 Results: A Precise H0 Estimate from DES Y1, BAO, and D/H Data

Research output: Contribution to journalArticlepeer-review

  • Dark Energy Survey

Related Edinburgh Organisations

Open Access permissions

Open

Documents

http://adsabs.harvard.edu/abs/2018MNRAS.480.3879A
Original languageEnglish
Pages (from-to)3879-3888
JournalMonthly Notices of the Royal Astronomical Society
Volume480
Issue number3
DOIs
Publication statusPublished - 20 Jul 2018

Abstract

We combine Dark Energy Survey Year 1 clustering and weak lensing data with baryon acoustic oscillations and Big Bang nucleosynthesis experiments to constrain the Hubble constant. Assuming a flat ΛCDM model with minimal neutrino mass (∑mν = 0.06 eV), we find H_0=67.4^{+1.1}_{-1.2} {km s^{-1} Mpc^{-1}} (68 per cent CL). This result is completely independent of Hubble constant measurements based on the distance ladder, cosmic microwave background anisotropies (both temperature and polarization), and strong lensing constraints. There are now five data sets that: (a) have no shared observational systematics; and (b) each constrains the Hubble constant with fractional uncertainty at the few-per cent level. We compare these five independent estimates, and find that, as a set, the differences between them are significant at the 2.5σ level (χ2/dof = 24/11, probability to exceed = 1.1 per cent). Having set the threshold for consistency at 3σ, we combine all five data sets to arrive at H_0=69.3^{+0.4}_{-0.6} {km s^{-1} Mpc^{-1}}.

    Research areas

  • cosmological parameters, cosmology: observations, distance scale

Download statistics

No data available

ID: 75931041