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

  • Author(s): Abbott, TMC
  • Allam, S
  • Andersen, P
  • Angus, C
  • Asorey, J
  • Avelino, A
  • Avila, S
  • Bassett, BA
  • Bechtol, K
  • Bernstein, GM
  • Bertin, E
  • Brooks, D
  • Brout, D
  • Brown, P
  • Burke, DL
  • Calcino, J
  • Rosell, AC
  • Carollo, D
  • Carrasco Kind, M
  • Carretero, J
  • Casas, R
  • Castander, FJ
  • Cawthon, R
  • Challis, P
  • Childress, M
  • Clocchiatti, A
  • Cunha, CE
  • D'Andrea, CB
  • Da Costa, LN
  • Davis, C
  • Davis, TM
  • De Vicente, J
  • Depoy, DL
  • Desai, S
  • Diehl, HT
  • Doel, P
  • Drlica-Wagner, A
  • Eifler, TF
  • Evrard, AE
  • Fernandez, E
  • Filippenko, AV
  • Finley, DA
  • Flaugher, B
  • Foley, RJ
  • Fosalba, P
  • Frieman, J
  • Galbany, L
  • García-Bellido, J
  • Gaztanaga, E
  • Giannantonio, T
  • Glazebrook, K
  • Goldstein, DA
  • González-Gaitán, S
  • Gruen, D
  • Gruendl, RA
  • Gschwend, J
  • Gupta, RR
  • Gutierrez, G
  • Hartley, WG
  • Hinton, SR
  • Hollowood, DL
  • Honscheid, K
  • Hoormann, JK
  • Hoyle, B
  • James, DJ
  • Jeltema, T
  • Johnson, MWG
  • Johnson, MD
  • Kasai, E
  • Kent, S
  • Kessler, R
  • Kim, AG
  • Kirshner, RP
  • Kovacs, E
  • Krause, E
  • Kron, R
  • Kuehn, K
  • Kuhlmann, S
  • Kuropatkin, N
  • Lahav, O
  • Lasker, J
  • Lewis, GF
  • Li, TS
  • Lidman, C
  • Lima, M
  • Lin, H
  • Macaulay, E
  • Maia, MAG
  • Mandel, KS
  • March, M
  • Marriner, J
  • Marshall, JL
  • Martini, P
  • Menanteau, F
  • Miller, CJ
  • Miquel, R
  • Miranda, V
  • Mohr, JJ
  • Morganson, E
  • Muthukrishna, D
  • et al.

Published Web Location

https://arxiv.org/pdf/1811.02374
No data is associated with this publication.
Abstract

© 2019. The American Astronomical Society. All rights reserved. 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 ΛCDM model we find a matter density Ω m = 0.331 ± 0.038. For a flat wCDM model, and combining our SN Ia constraints with those from the cosmic microwave background (CMB), we find a dark energy equation of state w = -0.978 ± 0.059, and ω m = 0.321 ± 0.018. For a flat w 0 w a CDM model, and combining probes from SN Ia, CMB and baryon acoustic oscillations, we find w0 = -0.885 ± 0.114 and w a = -0.387 ± 0.430. These results are in agreement with a cosmological constant and with previous constraints using SNe Ia (Pantheon, JLA).

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