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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 Lambda CDM model we find a matter density Omega(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 Omega(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 w(0) = -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).

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
United Kingdom Science and Technology Facilities Council; University of Illinois – Urbana-Champaign; Ohio State University; Brazilian Ministry of Science, Technology and Innovation (MCTI) - Financiadora de Estudos e Projetos (FINEP); Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq); German Research Foundation (DFG); Spanish Ministerio de Economia y Competitividad (MINECO); European Research Council (ERC); University of Chicago; National Science Foundation (NSF); Texas A&M University; Australian Research Council - Centre of Excellence for All-sky Astrophysics (CAASTRO)
OSTI Identifier:
1569854
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 872; Journal Issue: 2
Country of Publication:
United States
Language:
English
Subject:
dark energy; dark matter

Citation Formats

Abbott, T. M. C., Allam, S., Andersen, P., Angus, C., Asorey, J., Avelino, A., Avila, S., Bassett, B., Bechtol, K., Bernstein, G. M., Kovacs, E., Kuhlmann, S., and Spinka, H. First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters. United States: N. p., 2019. Web. doi:10.3847/2041-8213/ab04fa.
Abbott, T. M. C., Allam, S., Andersen, P., Angus, C., Asorey, J., Avelino, A., Avila, S., Bassett, B., Bechtol, K., Bernstein, G. M., Kovacs, E., Kuhlmann, S., & Spinka, H. First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters. United States. doi:10.3847/2041-8213/ab04fa.
Abbott, T. M. C., Allam, S., Andersen, P., Angus, C., Asorey, J., Avelino, A., Avila, S., Bassett, B., Bechtol, K., Bernstein, G. M., Kovacs, E., Kuhlmann, S., and Spinka, H. Wed . "First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters". United States. doi:10.3847/2041-8213/ab04fa.
@article{osti_1569854,
title = {First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters},
author = {Abbott, T. M. C. and Allam, S. and Andersen, P. and Angus, C. and Asorey, J. and Avelino, A. and Avila, S. and Bassett, B. and Bechtol, K. and Bernstein, G. M. and Kovacs, E. and Kuhlmann, S. and Spinka, H.},
abstractNote = {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 Lambda CDM model we find a matter density Omega(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 Omega(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 w(0) = -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).},
doi = {10.3847/2041-8213/ab04fa},
journal = {Astrophysical Journal Letters},
number = 2,
volume = 872,
place = {United States},
year = {2019},
month = {2}
}

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