First cosmological results using Type Ia supernovae from the Dark Energy Survey: Measurement of the Hubble constant

E. MacAulay, R. C. Nichol, D. Bacon, D. Brout, T. M. Davis, B. Zhang, B. A. Bassett, D. Scolnic, A. Möller, C. B. D'Andrea, S. R. Hinton, R. Kessler, A. G. Kim, J. Lasker, C. Lidman, M. Sako, M. Smith, M. Sullivan, T. M.C. Abbott, S. AllamJ. Annis, J. Asorey, S. Avila, K. Bechtol, D. Brooks, P. Brown, D. L. Burke, J. Calcino, A. Carnero Rosell, D. Carollo, M. Carrasco Kind, J. Carretero, F. J. Castander, T. Collett, M. Crocce, C. E. Cunha, L. N. Da Costa, C. Davis, J. De Vicente, H. T. Diehl, P. Doel, A. Drlica-Wagner, T. F. Eifler, J. Estrada, A. E. Evrard, A. V. Filippenko, D. A. Finley, B. Flaugher, R. J. Foley, P. Fosalba, J. Frieman, L. Galbany, J. García-Bellido, E. Gaztanaga, K. Glazebrook, S. González-Gaitán, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, W. G. Hartley, D. L. Hollowood, K. Honscheid, J. K. Hoormann, B. Hoyle, D. Huterer, B. Jain, D. J. James, T. Jeltema, E. Kasai, E. Krause, K. Kuehn, N. Kuropatkin, O. Lahav, G. F. Lewis, T. S. Li, M. Lima, H. Lin, M. A.G. Maia, J. L. Marshall, P. Martini, R. Miquel, P. Nugent, A. Palmese, Y. C. Pan, A. A. Plazas, A. K. Romer, A. Roodman, E. Sanchez, V. Scarpine, R. Schindler, M. Schubnell, S. Serrano, I. Sevilla-Noarbe, R. Sharp, M. Soares-Santos, F. Sobreira, N. E. Sommer, E. Suchyta, E. Swann, M. E.C. Swanson, G. Tarle, D. Thomas, R. C. Thomas, B. E. Tucker, S. A. Uddin, V. Vikram, A. R. Walker, P. Wiseman

Research output: Contribution to journalArticlepeer-review

99 Scopus citations

Abstract

We present an improved measurement of the Hubble constant (H0) using the 'inverse distance ladder' method, which adds the information from 207 Type Ia supernovae (SNe Ia) from the Dark Energy Survey (DES) at redshift 0.018 <z<0.85 to existing distance measurements of 122 low-redshift (z<0.07) SNe Ia (Low-z) and measurements ofBaryon Acoustic Oscillations (BAOs). Whereas traditional measurements of H0 with SNe Ia use a distance ladder of parallax and Cepheid variable stars, the inverse distance ladder relies on absolute distance measurements from the BAOs to calibrate the intrinsic magnitude of the SNe Ia.We find H0 = 67.8 1.3 km s-1 Mpc-1 (statistical and systematic uncertainties, 68 per cent confidence). Our measurement makes minimal assumptions about the underlying cosmological model, and our analysis was blinded to reduce confirmation bias. We examine possible systematic uncertainties and all are below the statistical uncertainties. Our H0 value is consistent with estimates derived from the Cosmic Microwave Background assuming a ΛCDM universe.

Original languageEnglish (US)
Pages (from-to)2184-2196
Number of pages13
JournalMonthly Notices of the Royal Astronomical Society
Volume486
Issue number2
DOIs
StatePublished - Jun 1 2019

Keywords

  • cosmological parameters
  • cosmology: observations
  • distance scale.

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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