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

By T. Abbott, Filipe B. Abdalla, James Annis, K. Bechtol, J. Blazek, B. Benson, R. Bernstein, G. Bernstein, E. Bertin, D. Brooks and 87 more. Monthly notices of the Royal Astronomical Society, 2017

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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 Lambda CDM model with minimal neutrino mass (Sigma m(v), = 0.06 eV), we find H-0 = 67.4(-1.2)(+1.1) 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 2.5 sigma level (chi(2)/dof = 24/11, probability to exceed = 1.1 per cent). Having set the threshold for consistency at 30 sigma we combine all five data sets to arrive at H-0 = 69.3(-0.6)(+0.4) km s(-1) Mpc(-1).

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9e051dbdc8a916ae30ce690b67ed525f979ac570

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In Astronomy and Astrophysics

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Citations in the corpus

• TDCOSMO IV: Hierarchical time-delay cosmography -- joint inference of the Hubble constant and galaxy density profiles (2020, methodology): “…(DES) data in combination with baryon acoustic oscillations (BAO) and Big Bang nucleosynthesis (BBN) measurements, giving H0 = 67.4± 1.2 km s−1 Mpc−1 (Abbott et al. 2018), and using the full-shape BAO analysis in the BOSS survey in combination with BBN, giving H0 = 68.4 ± 1.1 km s−1 Mpc−1…”
• First cosmological results using Type Ia supernovae from the Dark Energy Survey: measurement of the Hubble constant (2018, methodology): “We note that although BAO measurements alone could derive a value for H0 (e.g., see Figure 1), it would rely on the assumption of a cosmological model to extrapolate the BAO measurements to z = 0 (see e.g., DES Collaboration 2018).”
• A Hubble constant measurement from superluminal motion of the jet in GW170817 (2018, result): “These result in slightly smaller values of H0 compared to those with Abbott et al (2018)28.”