First cosmology results using type ia supernovae from the dark energy survey: Constraints on cosmological parameters

DES Collaboration

First cosmology results using type ia supernovae from the dark energy survey: Constraints on cosmological parameters

DES Collaboration

Research output: Contribution to journal › Article › peer-review

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 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 w₀w_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 (US)
Journal	Unknown Journal
State	Published - Nov 6 2018

Keywords

Cosmology
Supernovae

ASJC Scopus subject areas

General

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@article{5a954b404c8c4495a5f0c9d84ddfad96,

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 ΛCDM 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 w0waCDM 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 = "Cosmology, Supernovae",

author = "{DES 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 {Carnero Rosell}, A. and D. Carollo and {Carrasco Kind}, M. 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{\textquoteright}Andrea, {C. B.} and {da Costa}, {L. N.} and C. Davis and Davis, {T. M.} and {de Vicente}, J. 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 L. Galbany and J. Garc{\'i}a-Bellido and E. Gaztanaga and E. Rozo",

year = "2018",

month = nov,

day = "6",

language = "English (US)",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

}

TY - JOUR

T1 - First cosmology results using type ia supernovae from the dark energy survey

T2 - Constraints on cosmological parameters

AU - DES 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 - Carnero Rosell, A.

AU - Carollo, D.

AU - Carrasco Kind, M.

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 - da Costa, L. N.

AU - Davis, C.

AU - Davis, T. M.

AU - de Vicente, J.

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 - Galbany, L.

AU - García-Bellido, J.

AU - Gaztanaga, E.

AU - Rozo, E.

PY - 2018/11/6

Y1 - 2018/11/6

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 ΛCDM 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 w0waCDM 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 ΛCDM 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 w0waCDM 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 - Cosmology

KW - Supernovae

UR - http://www.scopus.com/inward/record.url?scp=85095361188&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85095361188&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85095361188

JO - Nuclear Physics A

JF - Nuclear Physics A

SN - 0375-9474

ER -