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Publication . Article . Preprint . 2019

Cosmological constraints from multiple probes in the Dark Energy Survey

T. M. C. Abbott; A. Alarcon; S. Allam; P. Andersen; F. Andrade-Oliveira; J. Annis; Jacobo Asorey; +156 Authors
Open Access
English
Abstract
The combination of multiple observational probes has long been advocated as a powerful technique to constrain cosmological parameters, in particular dark energy. The Dark Energy Survey has measured 207 spectroscopically--confirmed Type Ia supernova lightcurves; the baryon acoustic oscillation feature; weak gravitational lensing; and galaxy clustering. Here we present combined results from these probes, deriving constraints on the equation of state, $w$, of dark energy and its energy density in the Universe. Independently of other experiments, such as those that measure the cosmic microwave background, the probes from this single photometric survey rule out a Universe with no dark energy, finding $w=-0.80^{+0.09}_{-0.11}$. The geometry is shown to be consistent with a spatially flat Universe, and we obtain a constraint on the baryon density of $\Omega_b=0.069^{+0.009}_{-0.012}$ that is independent of early Universe measurements. These results demonstrate the potential power of large multi-probe photometric surveys and pave the way for order of magnitude advances in our constraints on properties of dark energy and cosmology over the next decade.
Comment: 8 pages, 2 figures; v3 matches version accepted by PRL
Subjects by Vocabulary

arXiv: Astrophysics::Cosmology and Extragalactic Astrophysics

Microsoft Academic Graph classification: Shape of the universe Equation of state (cosmology) Dark energy Physics Dark matter Universe media_common.quotation_subject media_common Weak gravitational lensing Cosmic microwave background Astrophysics Cosmology

Subjects

astro-ph.CO, RCUK, STFC, General Physics and Astronomy, Astrophysics - Cosmology and Nongalactic Astrophysics, Gravitation and Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], QC, MATÉRIA ESCURA, Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences

92 references, page 1 of 10

27Centro de Investigaciones Energe´ticas, Medioambientales y Tecnolo´gicas (CIEMAT), Madrid, Spain

28INAF, Astrophysical Observatory of Turin, I-10025 Pino Torinese, Italy

29Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USA

30National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA

31Institut de F´ısica d'Altes Energies (IFAE), The Barcelona Institute of

Science and Technology, Campus UAB, 08193 Bellaterra (Barcelona) Spain

32Physics Department, 2320 Chamberlin Hall, University of Wisconsin-Madison, 1150 University Avenue Madison, WI 53706-1390

33Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637, USA

34Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA

35School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK

Funded by
EC| COGS
Project
COGS
Capitalizing on Gravitational Shear
  • Funder: European Commission (EC)
  • Project Code: 240672
  • Funding stream: FP7 | SP2 | ERC
,
NSF| Collaborative Research: The Dark Energy Survey Data Management Operations
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1138766
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Astronomical Sciences
,
EC| COSMICDAWN
Project
COSMICDAWN
Understanding the Origin of Cosmic Structure
  • Funder: European Commission (EC)
  • Project Code: 306478
  • Funding stream: FP7 | SP2 | ERC
,
EC| TESTDE
Project
TESTDE
Testing the Dark Energy Paradigm and Measuring Neutrino Mass with the Dark Energy Survey
  • Funder: European Commission (EC)
  • Project Code: 291329
  • Funding stream: FP7 | SP2 | ERC
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