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Cosmological constraints from multiple probes in the dark energy survey

Cosmological constraints from multiple probes in the dark energy survey
Cosmological constraints from multiple probes in the dark energy survey

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 light curves, 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=-0.80-0.11+0.09. The geometry is shown to be consistent with a spatially flat Universe, and we obtain a constraint on the baryon density of ωb=0.069-0.012+0.009 that is independent of early Universe measurements. These results demonstrate the potential power of large multiprobe 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.

0031-9007
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Childress, M.
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D'Andrea, C. B.
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Davis, C.
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Li, T. S.
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Lin, H.
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DES Collaboration
Abbott, T. M.C.
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Castander, F. J.
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Chang, C.
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Davis, C.
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Lin, H.
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Smith, M.
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Thomas, D.
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Zhang, B.
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Zhang, Y.
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DES Collaboration (2019) Cosmological constraints from multiple probes in the dark energy survey. Physical Review Letters, 122 (17), [171301]. (doi:10.1103/PhysRevLett.122.171301).

Record type: Article

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 light curves, 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=-0.80-0.11+0.09. The geometry is shown to be consistent with a spatially flat Universe, and we obtain a constraint on the baryon density of ωb=0.069-0.012+0.009 that is independent of early Universe measurements. These results demonstrate the potential power of large multiprobe 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.

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e-pub ahead of print date: 1 May 2019

Identifiers

Local EPrints ID: 431446
URI: http://eprints.soton.ac.uk/id/eprint/431446
ISSN: 0031-9007
PURE UUID: 5eb2f9e7-4109-45cc-ad7a-7d94aabdade6
ORCID for M. Smith: ORCID iD orcid.org/0000-0002-3321-1432

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Date deposited: 04 Jun 2019 16:30
Last modified: 11 Sep 2020 01:41

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Contributors

Author: T. M.C. Abbott
Author: A. Alarcon
Author: S. Allam
Author: P. Andersen
Author: F. Andrade-Oliveira
Author: J. Annis
Author: J. Asorey
Author: S. Avila
Author: D. Bacon
Author: N. Banik
Author: B. A. Bassett
Author: E. Baxter
Author: K. Bechtol
Author: M. R. Becker
Author: G. M. Bernstein
Author: E. Bertin
Author: J. Blazek
Author: S. L. Bridle
Author: D. Brooks
Author: D. Brout
Author: D. L. Burke
Author: J. Calcino
Author: H. Camacho
Author: A. Campos
Author: A. Carnero Rosell
Author: D. Carollo
Author: M. Carrasco Kind
Author: J. Carretero
Author: F. J. Castander
Author: C. Chang
Author: M. Childress
Author: C. B. D'Andrea
Author: C. Davis
Author: T. M. Davis
Author: M. Jarvis
Author: S. Kent
Author: G. F. Lewis
Author: T. S. Li
Author: H. Lin
Author: J. L. Marshall
Author: A. J. Ross
Author: E. Sanchez
Author: R. Sharp
Author: M. Smith ORCID iD
Author: D. Thomas
Author: R. C. Thomas
Author: A. R. Walker
Author: M. Wang
Author: B. Zhang
Author: Y. Zhang
Corporate Author: DES Collaboration

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