First cosmology results using Type Ia Supernovae from the Dark Energy Survey: constraints on cosmological parameters

Dark Energy Survey Collaboration; S. Avila; C. B. D'Andrea; E. Macaulay; R. C. Nichol; E. Swann; D. Thomas

doi:10.3847/2041-8213/ab04fa

First cosmology results using Type Ia Supernovae from the Dark Energy Survey: constraints on cosmological parameters

Dark Energy Survey Collaboration
, S. Avila
, C. B. D'Andrea
, E. Macaulay
, R. C. Nichol
, E. Swann
, D. Thomas

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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 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 w₀ w _aCDM 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).

Original language	English
Article number	L30
Number of pages	9
Journal	The Astrophysical Journal Letters
Volume	872
Issue number	2
DOIs	https://doi.org/10.3847/2041-8213/ab04fa
Publication status	Published - 21 Feb 2019

Keywords

astro-ph.CO
RCUK
STFC

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10.3847/2041-8213/ab04fa

First cosmology results using Type Ia Supernovae
T. M. C. Abbott et al 2019 ApJL 872 L30. © 2019. The American Astronomical Society. All rights reserved. Reproduced by permission of the AAS.
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Data availability statement for 'First cosmology results using Type Ia Supernovae from the Dark Energy Survey: constraints on cosmological parameters'.
Avila Perez, S. J. (Creator), D'Andrea, C. B. (Creator), Macaulay, E. R. M. (Creator), Nichol, B. (Creator), Swann, E. S. (Creator) & Thomas, D. (Creator), IOP Publishing, 19 Feb 2019
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@article{fa4facbe2dab4f359143d53128872814,

title = "First cosmology results using Type Ia Supernovae from the Dark Energy Survey: constraints on cosmological parameters",

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 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 Ωm = 0.321 +\_ 0.018. For a flat w0 w aCDM model, and combining probes from SN Ia, CMB and baryon acoustic oscillations, we find w0 = -0.885 +\_ 0.114 and wa = -0.387 +\_ 0.430. These results are in agreement with a cosmological constant and with previous constraints using SNe Ia (Pantheon, JLA).",

keywords = "astro-ph.CO, RCUK, STFC",

author = "\{Dark Energy Survey Collaboration\} and Abbott, \{T. M. C.\} and S. Allam and P. Andersen and C. Angus and J. Asorey and A. Avelino and S. Avila and Bassett, \{B. A.\} and K. Bechtol and Bernstein, \{G. M.\} and E. Bertin and D. Brooks and D. Brout and P. Brown and Burke, \{D. L.\} and J. Calcino and Rosell, \{A. Carnero\} and D. Carollo and Kind, \{M. Carrasco\} and J. Carretero and R. Casas and Castander, \{F. J.\} and R. Cawthon and P. Challis and M. Childress and A. Clocchiatti and Cunha, \{C. E.\} and D'Andrea, \{C. B.\} and Costa, \{L. N. da\} and C. Davis and Davis, \{T. M.\} and Vicente, \{J. De\} and DePoy, \{D. L.\} and S. Desai and Diehl, \{H. T.\} and P. Doel and A. Drlica-Wagner and Eifler, \{T. F.\} and Evrard, \{A. E.\} and E. Fernandez and Filippenko, \{A. V.\} and Finley, \{D. A.\} and B. Flaugher and Foley, \{R. J.\} and P. Fosalba and J. Frieman and E. Macaulay and Nichol, \{R. C.\} and E. Swann and D. Thomas",

year = "2019",

month = feb,

day = "21",

doi = "10.3847/2041-8213/ab04fa",

language = "English",

volume = "872",

journal = "The Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

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TY - JOUR

T1 - First cosmology results using Type Ia Supernovae from the Dark Energy Survey

T2 - constraints on cosmological parameters

AU - Dark Energy Survey Collaboration

AU - Abbott, T. M. C.

AU - Allam, S.

AU - Andersen, P.

AU - Angus, C.

AU - Asorey, J.

AU - Avelino, A.

AU - Avila, S.

AU - Bassett, B. A.

AU - Bechtol, K.

AU - Bernstein, G. M.

AU - Bertin, E.

AU - Brooks, D.

AU - Brout, D.

AU - Brown, P.

AU - Burke, D. L.

AU - Calcino, J.

AU - Rosell, A. Carnero

AU - Carollo, D.

AU - Kind, M. Carrasco

AU - Carretero, J.

AU - Casas, R.

AU - Castander, F. J.

AU - Cawthon, R.

AU - Challis, P.

AU - Childress, M.

AU - Clocchiatti, A.

AU - Cunha, C. E.

AU - D'Andrea, C. B.

AU - Costa, L. N. da

AU - Davis, C.

AU - Davis, T. M.

AU - Vicente, J. De

AU - DePoy, D. L.

AU - Desai, S.

AU - Diehl, H. T.

AU - Doel, P.

AU - Drlica-Wagner, A.

AU - Eifler, T. F.

AU - Evrard, A. E.

AU - Fernandez, E.

AU - Filippenko, A. V.

AU - Finley, D. A.

AU - Flaugher, B.

AU - Foley, R. J.

AU - Fosalba, P.

AU - Frieman, J.

AU - Macaulay, E.

AU - Nichol, R. C.

AU - Swann, E.

AU - Thomas, D.

PY - 2019/2/21

Y1 - 2019/2/21

N2 - 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 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 Ωm = 0.321 +_ 0.018. For a flat w0 w aCDM model, and combining probes from SN Ia, CMB and baryon acoustic oscillations, we find w0 = -0.885 +_ 0.114 and wa = -0.387 +_ 0.430. These results are in agreement with a cosmological constant and with previous constraints using SNe Ia (Pantheon, JLA).

AB - 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 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 Ωm = 0.321 +_ 0.018. For a flat w0 w aCDM model, and combining probes from SN Ia, CMB and baryon acoustic oscillations, we find w0 = -0.885 +_ 0.114 and wa = -0.387 +_ 0.430. These results are in agreement with a cosmological constant and with previous constraints using SNe Ia (Pantheon, JLA).

KW - astro-ph.CO

KW - RCUK

KW - STFC

U2 - 10.3847/2041-8213/ab04fa

DO - 10.3847/2041-8213/ab04fa

M3 - Article

SN - 2041-8205

VL - 872

JO - The Astrophysical Journal Letters

JF - The Astrophysical Journal Letters

IS - 2

M1 - L30

ER -

First cosmology results using Type Ia Supernovae from the Dark Energy Survey: constraints on cosmological parameters

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