publication . Article . Preprint . 2019

First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters

T. M. C. Abbott; Sahar S. Allam; Per Kragh Andersen; C. R. Angus; Jacobo Asorey; Arturo Avelino; Santiago Avila; Bruce A. Bassett; Keith Bechtol; Gary M. Bernstein; ...
Open Access English
  • Published: 21 Feb 2019
  • Publisher: HAL CCSD
Abstract
We present the first cosmological parameter constraints using measurements of type Ia supernovae (SNe Ia) from the Dark Energy Survey Supernova Program (DES-SN). The analysis uses a subsample of 207 spectroscopically confirmed SNe Ia from the first three years of DES-SN, combined with a low-redshift sample of 122 SNe from the literature. Our "DES-SN3YR" result from these 329 SNe Ia is based on a series of companion analyses and improvements covering SN Ia discovery, spectroscopic selection, photometry, calibration, distance bias corrections, and evaluation of systematic uncertainties. For a flat LCDM model we find a matter density Ωm = 0.331 +_ 0.038. For a flat...
Persistent Identifiers
Subjects
free text keywords: dark energy, dark matter, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], dark energy, dark matter, Astronomical And Space Sciences, Astronomy & Astrophysics, QC, astro-ph.CO, RCUK, STFC, Astrophysics - Cosmology and Nongalactic Astrophysics, Space and Planetary Science, Astronomy and Astrophysics, Photometry (optics), Supernova, Baryon acoustic oscillations, Cosmological constant, Astrophysics, Omega, Cosmic microwave background, Cosmology, Physics, Dark energy
Funded by
EC| COSMICDAWN
Project
COSMICDAWN
Understanding the Origin of Cosmic Structure
  • Funder: European Commission (EC)
  • Project Code: 306478
  • Funding stream: FP7 | SP2 | ERC
,
EC| SPCND
Project
SPCND
Supernovae: Physics and Cosmology in the Next Decade
  • Funder: European Commission (EC)
  • Project Code: 615929
  • 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
,
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
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