The Dark Energy Survey Supernova Program: Cosmological Analysis and Systematic Uncertainties
Abstract We present the full Hubble diagram of photometrically classified Type Ia supernovae (SNe Ia) from the Dark Energy Survey supernova program (DES-SN). DES-SN discovered more than 20,000 SN candidates and obtained spectroscopic redshifts of 7000 host galaxies. Based on the light-curve quality, we select 1635 photometrically identified SNe Ia with spectroscopic redshift 0.10 < z < 1.13, which is the largest sample of supernovae from any single survey and increases the number of known z > 0.5 supernovae by a factor of 5. In a companion paper, we present cosmological results of the DES-SN sample combined with 194 spectroscopically classified SNe Ia at low redshift as an anchor for cosmological fits. Here we present extensive modeling of this combined sample and validate the entire analysis pipeline used to derive distances. We show that the statistical and systematic uncertainties on cosmological parameters are <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mi>σ</mml:mi> </mml:mrow> <mml:mrow> <mml:msub> <mml:mrow> <mml:mi mathvariant="normal">Ω</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> </mml:msub> <mml:mo>,</mml:mo> <mml:mi>stat</mml:mi> <mml:mo>+</mml:mo> <mml:mi>sys</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant="normal">Λ</mml:mi> <mml:mi>CDM</mml:mi> </mml:mrow> </mml:msubsup> <mml:mo>=</mml:mo> </mml:math> 0.017 in a flat ΛCDM model, and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo stretchy="false">(</mml:mo> <mml:msub> <mml:mrow> <mml:mi>σ</mml:mi> </mml:mrow> <mml:mrow> <mml:msub> <mml:mrow> <mml:mi mathvariant="normal">Ω</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> </mml:msub> </mml:mrow> </mml:msub> <mml:mo>,</mml:mo> <mml:msub> <mml:mrow> <mml:mi>σ</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>w</mml:mi> </mml:mrow> </mml:msub> <mml:msubsup> <mml:mrow> <mml:mo stretchy="false">)</mml:mo> </mml:mrow> <mml:mrow> <mml:mi>stat</mml:mi> <mml:mo>+</mml:mo> <mml:mi>sys</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>w</mml:mi> <mml:mi>CDM</mml:mi> </mml:mrow> </mml:msubsup> </mml:math> = (0.082, 0.152) in a flat w CDM model. Combining the DES SN data with the highly complementary cosmic microwave background measurements by Planck Collaboration reduces by a factor of 4 uncertainties on cosmological parameters. In all cases, statistical uncertainties dominate over systematics. We show that uncertainties due to photometric classification make up less than 10% of the total systematic uncertainty budget. This result sets the stage for the next generation of SN cosmology surveys such as the Vera C. Rubin Observatory's Legacy Survey of Space and Time.
Authors
- R. J. Foley (ORCID: https://orcid.org/0000-0002-2445-5275)
- B. Sánchez (ORCID: https://orcid.org/0000-0002-8687-0669)
- D. J. James
- Benjamin Rose (ORCID: https://orcid.org/0000-0002-1873-8973)
- D. Sanchez Cid
- I. Ferrero (ORCID: https://orcid.org/0000-0002-1295-1132)
- D.L Hollowood
- S. R. Hinton (ORCID: https://orcid.org/0000-0003-2071-9349)
- D. Brooks (ORCID: https://orcid.org/0000-0002-8458-5047)
- A. Möller (ORCID: https://orcid.org/0000-0001-8211-8608)
- Anthony Carr (ORCID: https://orcid.org/0000-0003-4074-5659)
- U Malik (ORCID: https://orcid.org/0000-0002-0036-1696)
- L. Galbany (ORCID: https://orcid.org/0000-0002-1296-6887)
- M. Gatti (ORCID: https://orcid.org/0000-0001-6134-8797)
- J. Carretero (ORCID: https://orcid.org/0000-0002-3130-0204)
- D. Scolnic (ORCID: https://orcid.org/0000-0002-4934-5849)
- S. Allam (ORCID: https://orcid.org/0000-0002-7069-7857)
- G. Giannini
- L. N. da Costa (ORCID: https://orcid.org/0000-0002-7731-277X)
- A. Pieres
- R Chen (ORCID: https://orcid.org/0000-0003-3917-0966)
- P. Armstrong (ORCID: https://orcid.org/0000-0003-1997-3649)
- A. Roodman
- E. Kovacs (ORCID: https://orcid.org/0000-0002-2545-1989)
- D. Gruen (ORCID: https://orcid.org/0000-0003-3270-7644)
- Karl Glazebrook (ORCID: https://orcid.org/0000-0002-3254-9044)
- F. J. Castander (ORCID: https://orcid.org/0000-0001-7316-4573)
- Kathy Romer (ORCID: https://orcid.org/0000-0002-9328-879X)
- A. A. Plazas (ORCID: https://orcid.org/0000-0002-2598-0514)
- Gregory Tarlé (ORCID: https://orcid.org/0000-0003-1704-0781)
- F. Yuan (ORCID: https://orcid.org/0000-0001-8315-4176)
- E. Suchyta (ORCID: https://orcid.org/0000-0002-7047-9358)
- A. Porredon (ORCID: https://orcid.org/0000-0002-2762-2024)
- Brad E. Tucker (ORCID: https://orcid.org/0000-0002-4283-5159)
- O. Alves (ORCID: https://orcid.org/0000-0002-7394-9466)
- P. Wiseman (ORCID: https://orcid.org/0000-0002-3073-1512)
- Gail Taylor (ORCID: https://orcid.org/0000-0001-8470-6390)
- A. R. Walker (ORCID: https://orcid.org/0000-0002-7123-8943)
- Helen Qu (ORCID: https://orcid.org/0000-0003-1899-9791)
- G. M. Bernstein (ORCID: https://orcid.org/0000-0002-8613-8259)
- Or Graur (ORCID: https://orcid.org/0000-0002-4391-6137)
- N. Weaverdyck (ORCID: https://orcid.org/0000-0001-9382-5199)
- K. Bechtol (ORCID: https://orcid.org/0000-0001-8156-0429)
- J. García-Bellido (ORCID: https://orcid.org/0000-0002-9370-8360)
- Eusebio Sanchez (ORCID: https://orcid.org/0000-0002-9646-8198)
- Dillon Brout (ORCID: https://orcid.org/0000-0001-5201-8374)
- J. Mena-Fernández (ORCID: https://orcid.org/0000-0001-9497-7266)
- A. Carnero Rosell (ORCID: https://orcid.org/0000-0003-3044-5150)
- A. Palmese
- C. Conselice
- M. Schubnell
- R. Camilleri
- K. Kuehn (ORCID: https://orcid.org/0000-0003-0120-0808)
- R. A. Gruendl (ORCID: https://orcid.org/0000-0002-4588-6517)
- J. Frieman
- N. Kuropatkin (ORCID: https://orcid.org/0000-0003-2511-0946)
- F. Menanteau (ORCID: https://orcid.org/0000-0002-1372-2534)
- M. Sullivan
- L Kelsey (ORCID: https://orcid.org/0000-0003-0313-0487)
- M. Vincenzi (ORCID: https://orcid.org/0000-0001-8788-1688)
- S. Lee (ORCID: https://orcid.org/0000-0002-8289-740X)
- T. M. Davis (ORCID: https://orcid.org/0000-0002-4213-8783)
- M. Acevedo (ORCID: https://orcid.org/0000-0002-5389-7961)
- Bruce A. Bassett (ORCID: https://orcid.org/0000-0001-7700-1069)
- B. Flaugher
- M. E. S. Pereira (ORCID: https://orcid.org/0000-0002-7131-7684)
- Christopher E. Lidman (ORCID: https://orcid.org/0000-0003-1731-0497)
- R. Kessler
- H. T. Diehl (ORCID: https://orcid.org/0000-0002-8357-7467)
- S. Desai (ORCID: https://orcid.org/0000-0002-0466-3288)
- F. Andrade-Oliveira (ORCID: https://orcid.org/0000-0003-0171-6900)
- Dragan Huterer (ORCID: https://orcid.org/0000-0001-6558-0112)
- K. Honscheid
- D. L. Tucker (ORCID: https://orcid.org/0000-0001-7211-5729)
- D. N. Friedel (ORCID: https://orcid.org/0000-0002-3632-7668)
- C. Frohmaier (ORCID: https://orcid.org/0000-0001-9553-4723)
- J. Asorey
- M. Toy
- D. L. Burke
- R. C. Nichol (ORCID: https://orcid.org/0000-0003-0939-6518)
- M. Yamamoto (ORCID: https://orcid.org/0000-0003-1585-997X)
- H. Lin (ORCID: https://orcid.org/0000-0002-7825-3206)
- J. Annis
- D. Carollo (ORCID: https://orcid.org/0000-0003-4710-132X)
- M. Sako
- C. To
- O. Lahav
- R. Miquel
- M. E. C. Swanson
- I Sevilla-Noarbe
- M. Aguena
- M. Smith
- J Lee (ORCID: https://orcid.org/0000-0001-6633-9793)
- T. M. C. Abbott
- Peter Doel (ORCID: https://orcid.org/0000-0002-6397-4457)
- J. L. Marshall
- D. Bacon
- B. Popovic
Institutions
- Centre de physique des particules de Marseille (FR)
- Laboratoire de Physique Subatomique et de Cosmologie (FR)
- Institute of Nuclear Physics of Lyon (FR)
- Institut de Physique des 2 Infinis de Lyon (FR)
Publication Details
- Journal
- The Astrophysical Journal
- Published
- 2024-10-25
- DOI
- https://doi.org/10.3847/1538-4357/ad5e6c
- Citations
- 70
- Primary Topic
- Gamma-ray bursts and supernovae
- Type
- article
- Field-Weighted Citation Impact
- 23.21
Funders
- Science and Technology Facilities Council