publication . Article . 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
  • Published: 21 Feb 2019 Journal: The Astrophysical Journal, volume 872, page L30 (eissn: 2041-8213, Copyright policy)
  • Publisher: American Astronomical Society
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 Omega_m = 0.331 +_ 0.038. For a...
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free text keywords: Space and Planetary Science, Astronomy and Astrophysics, Photometry (optics), Supernova, Baryon acoustic oscillations, Cosmological constant, Astrophysics, Omega, Cosmic microwave background, Cosmology, Physics, Dark energy
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