The Dark Energy Survey: cosmology results with ∼1500 new high-redshift type Ia supernovae using the full 5 yr data set

DES Collaboration; T. M. C. Abbott; M. Acevedo; M. Aguena; A. Alarcon; S. Allam; O. Alves; A. Amon; F. Andrade-Oliveira; J. Annis; P. Armstrong; J. Asorey; S. Avila; D. Bacon; B. A. Bassett; K. Bechtol; P. H. Bernardinelli; G. M. Bernstein; E. Bertin; J. Blazek; S. Bocquet; D. Brooks; D. Brout; E. Buckley-Geer; D. L. Burke; H. Camacho; R. Camilleri; A. Campos; A. Carnero Rosell; D. Carollo; A. Carr; J. Carretero; F. J. Castander; R. Cawthon; C. Chang; R. Chen; A. Choi; C. Conselice; M. Costanzi; L. N. da Costa; M. Crocce; T. M. Davis; D. L. DePoy; S. Desai; H. T. Diehl; M. Dixon; S. Dodelson; P. Doel; C. Doux; A. Drlica-Wagner; J. Elvin-Poole; S. Everett; I. Ferrero; A. Ferté; B. Flaugher; R. J. Foley; P. Fosalba; D. Friedel; J. Frieman; C. Frohmaier; L. Galbany; J. García-Bellido; M. Gatti; E. Gaztanaga; G. Giannini; K. Glazebrook; O. Graur; D. Gruen; R. A. Gruendl; G. Gutierrez; W. G. Hartley; K. Herner; S. R. Hinton; D. L. Hollowood; K. Honscheid; D. Huterer; B. Jain; D. J. James; N. Jeffrey; E. Kasai; L. Kelsey; S. Kent; R. Kessler; A. G. Kim; R. P. Kirshner; E. Kovacs; K. Kuehn; O. Lahav; J. Lee; S. Lee; G. F. Lewis; T. S. Li; C. Lidman; H. Lin; U. Malik; J. L. Marshall; P. Martini; J. Mena-Fernández; F. Menanteau; R. Miquel; J. J. Mohr; J. Mould; J. Muir; A. Möller; E. Neilsen; R. C. Nichol; P. Nugent; R. L. C. Ogando; A. Palmese; Y. -C. Pan; M. Paterno; W. J. Percival; M. E. S. Pereira; A. Pieres; A. A. Plazas Malagón; B. Popovic; A. Porredon; J. Prat; H. Qu; M. Raveri; M. Rodríguez-Monroy; A. K. Romer; A. Roodman; B. Rose; M. Sako; E. Sanchez; D. Sanchez Cid; M. Schubnell; D. Scolnic; I. Sevilla-Noarbe; P. Shah; J. Allyn Smith; M. Smith; M. Soares-Santos; E. Suchyta; M. Sullivan; N. Suntzeff; M. E. C. Swanson; B. O. Sánchez; G. Tarle; G. Taylor; D. Thomas; C. To; M. Toy; M. A. Troxel; B. E. Tucker; D. L. Tucker; S. A. Uddin; M. Vincenzi; A. R. Walker; N. Weaverdyck; R. H. Wechsler; J. Weller; W. Wester; P. Wiseman; M. Yamamoto; F. Yuan; B. Zhang; Y. Zhang

doi:10.3847/2041-8213/ad6f9f

The Dark Energy Survey: cosmology results with ∼1500 new high-redshift type Ia supernovae using the full 5 yr data set

DES Collaboration, T. M. C. Abbott, M. Acevedo, M. Aguena, A. Alarcon, S. Allam, O. Alves, A. Amon, F. Andrade-Oliveira, J. Annis, P. Armstrong, J. Asorey, S. Avila, D. Bacon, B. A. Bassett, K. Bechtol, P. H. Bernardinelli, G. M. Bernstein, E. Bertin, J. BlazekS. Bocquet, D. Brooks, D. Brout, E. Buckley-Geer, D. L. Burke, H. Camacho, R. Camilleri, A. Campos, A. Carnero Rosell, D. Carollo, A. Carr, J. Carretero, F. J. Castander, R. Cawthon, C. Chang, R. Chen, A. Choi, C. Conselice, M. Costanzi, L. N. da Costa, M. Crocce, T. M. Davis, D. L. DePoy, S. Desai, H. T. Diehl, M. Dixon, S. Dodelson, P. Doel, C. Doux, A. Drlica-Wagner, J. Elvin-Poole, S. Everett, I. Ferrero, A. Ferté, B. Flaugher, R. J. Foley, P. Fosalba, D. Friedel, J. Frieman, C. Frohmaier, L. Galbany, J. García-Bellido, M. Gatti, E. Gaztanaga, G. Giannini, K. Glazebrook, O. Graur, D. Gruen, R. A. Gruendl, G. Gutierrez, W. G. Hartley, K. Herner, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. Huterer, B. Jain, D. J. James, N. Jeffrey, E. Kasai, L. Kelsey, S. Kent, R. Kessler, A. G. Kim, R. P. Kirshner, E. Kovacs, K. Kuehn, O. Lahav, J. Lee, S. Lee, G. F. Lewis, T. S. Li, C. Lidman, H. Lin, U. Malik, J. L. Marshall, P. Martini, J. Mena-Fernández, F. Menanteau, R. Miquel, J. J. Mohr, J. Mould, J. Muir, A. Möller, E. Neilsen, R. C. Nichol, P. Nugent, R. L. C. Ogando, A. Palmese, Y. -C. Pan, M. Paterno, W. J. Percival, M. E. S. Pereira, A. Pieres, A. A. Plazas Malagón, B. Popovic, A. Porredon, J. Prat, H. Qu, M. Raveri, M. Rodríguez-Monroy, A. K. Romer, A. Roodman, B. Rose, M. Sako, E. Sanchez, D. Sanchez Cid, M. Schubnell, D. Scolnic, I. Sevilla-Noarbe, P. Shah, J. Allyn Smith, M. Smith, M. Soares-Santos, E. Suchyta, M. Sullivan, N. Suntzeff, M. E. C. Swanson, B. O. Sánchez, G. Tarle, G. Taylor, D. Thomas, C. To, M. Toy, M. A. Troxel, B. E. Tucker, D. L. Tucker, S. A. Uddin, M. Vincenzi, A. R. Walker, N. Weaverdyck, R. H. Wechsler, J. Weller, W. Wester, P. Wiseman, M. Yamamoto, F. Yuan, B. Zhang, Y. Zhang

Australian Astronomical Optics

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Abstract

We present cosmological constraints from the sample of Type Ia supernovae (SNe Ia) discovered and measured during the full 5 yr of the Dark Energy Survey (DES) SN program. In contrast to most previous cosmological samples, in which SNe are classified based on their spectra, we classify the DES SNe using a machine learning algorithm applied to their light curves in four photometric bands. Spectroscopic redshifts are acquired from a dedicated follow-up survey of the host galaxies. After accounting for the likelihood of each SN being an SN Ia, we find 1635 DES SNe in the redshift range 0.10 < z < 1.13 that pass quality selection criteria sufficient to constrain cosmological parameters. This quintuples the number of high-quality z > 0.5 SNe compared to the previous leading compilation of Pantheon+ and results in the tightest cosmological constraints achieved by any SN data set to date. To derive cosmological constraints, we combine the DES SN data with a high-quality external low-redshift sample consisting of 194 SNe Ia spanning 0.025 < z < 0.10. Using SN data alone and including systematic uncertainties, we find Ω_M = 0.352 ± 0.017 in flat ΛCDM. SN data alone now require acceleration (q₀ < 0 in ΛCDM) with over 5σ confidence. We find (Ω_m, w) = (0.264_-0.096^+0.074, 80_-0.16^+0.14) in flat wCDM. For flat w₀w_aCDM, we find (Ω_M,w₀, w_a) = (0.495_-0.043^+0.033, -0.36_-0.30^+0.36 -8.8_-4.5^+3.7, consistent with a constant equation of state to within ∼2σ. Including Planck cosmic microwave background, Sloan Digital Sky Survey baryon acoustic oscillation, and DES 3 × 2pt data gives (Ω_M, w) = (0.321 ± 0.007, -0.941 ± 0.026). In all cases, dark energy is consistent with a cosmological constant to within ∼2σ. Systematic errors on cosmological parameters are subdominant compared to statistical errors; these results thus pave the way for future photometrically classified SN analyses.

Original language	English
Article number	L14
Pages (from-to)	1-20
Number of pages	20
Journal	Astrophysical Journal Letters
Volume	973
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/ad6f9f
Publication status	Published - 20 Sept 2024

Bibliographical note

Copyright the Author(s) 2024. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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10.3847/2041-8213/ad6f9fLicence: CC BY

Publisher version (open access)Final published version, 2.59 MBLicence: CC BY

Cite this

DES Collaboration, Abbott, T. M. C., Acevedo, M., Aguena, M., Alarcon, A., Allam, S., Alves, O., Amon, A., Andrade-Oliveira, F., Annis, J., Armstrong, P., Asorey, J., Avila, S., Bacon, D., Bassett, B. A., Bechtol, K., Bernardinelli, P. H., Bernstein, G. M., Bertin, E., ... Zhang, Y. (2024). The Dark Energy Survey: cosmology results with ∼1500 new high-redshift type Ia supernovae using the full 5 yr data set. Astrophysical Journal Letters, 973(1), 1-20. Article L14. https://doi.org/10.3847/2041-8213/ad6f9f

@article{b3cd6f799f524afc9db76bd0d93eba25,

title = "The Dark Energy Survey: cosmology results with ∼1500 new high-redshift type Ia supernovae using the full 5 yr data set",

abstract = "We present cosmological constraints from the sample of Type Ia supernovae (SNe Ia) discovered and measured during the full 5 yr of the Dark Energy Survey (DES) SN program. In contrast to most previous cosmological samples, in which SNe are classified based on their spectra, we classify the DES SNe using a machine learning algorithm applied to their light curves in four photometric bands. Spectroscopic redshifts are acquired from a dedicated follow-up survey of the host galaxies. After accounting for the likelihood of each SN being an SN Ia, we find 1635 DES SNe in the redshift range 0.10 < z < 1.13 that pass quality selection criteria sufficient to constrain cosmological parameters. This quintuples the number of high-quality z > 0.5 SNe compared to the previous leading compilation of Pantheon+ and results in the tightest cosmological constraints achieved by any SN data set to date. To derive cosmological constraints, we combine the DES SN data with a high-quality external low-redshift sample consisting of 194 SNe Ia spanning 0.025 < z < 0.10. Using SN data alone and including systematic uncertainties, we find ΩM = 0.352 ± 0.017 in flat ΛCDM. SN data alone now require acceleration (q0 < 0 in ΛCDM) with over 5σ confidence. We find (Ωm, w) = (0.264-0.096+0.074, 80-0.16+0.14) in flat wCDM. For flat w0waCDM, we find (ΩM,w0, wa) = (0.495-0.043+0.033, -0.36-0.30+0.36 -8.8-4.5+3.7, consistent with a constant equation of state to within ∼2σ. Including Planck cosmic microwave background, Sloan Digital Sky Survey baryon acoustic oscillation, and DES 3 × 2pt data gives (ΩM, w) = (0.321 ± 0.007, -0.941 ± 0.026). In all cases, dark energy is consistent with a cosmological constant to within ∼2σ. Systematic errors on cosmological parameters are subdominant compared to statistical errors; these results thus pave the way for future photometrically classified SN analyses.",

author = "{DES Collaboration} and Abbott, {T. M. C.} and M. Acevedo and M. Aguena and A. Alarcon and S. Allam and O. Alves and A. Amon and F. Andrade-Oliveira and J. Annis and P. Armstrong and J. Asorey and S. Avila and D. Bacon and Bassett, {B. A.} and K. Bechtol and Bernardinelli, {P. H.} and Bernstein, {G. M.} and E. Bertin and J. Blazek and S. Bocquet and D. Brooks and D. Brout and E. Buckley-Geer and Burke, {D. L.} and H. Camacho and R. Camilleri and A. Campos and {Carnero Rosell}, A. and D. Carollo and A. Carr and J. Carretero and Castander, {F. J.} and R. Cawthon and C. Chang and R. Chen and A. Choi and C. Conselice and M. Costanzi and {da Costa}, {L. N.} and M. Crocce and Davis, {T. M.} and DePoy, {D. L.} and S. Desai and Diehl, {H. T.} and M. Dixon and S. Dodelson and P. Doel and C. Doux and A. Drlica-Wagner and J. Elvin-Poole and S. Everett and I. Ferrero and A. Fert{\'e} and B. Flaugher and Foley, {R. J.} and P. Fosalba and D. Friedel and J. Frieman and C. Frohmaier and L. Galbany and J. Garc{\'i}a-Bellido and M. Gatti and E. Gaztanaga and G. Giannini and K. Glazebrook and O. Graur and D. Gruen and Gruendl, {R. A.} and G. Gutierrez and Hartley, {W. G.} and K. Herner and Hinton, {S. R.} and Hollowood, {D. L.} and K. Honscheid and D. Huterer and B. Jain and James, {D. J.} and N. Jeffrey and E. Kasai and L. Kelsey and S. Kent and R. Kessler and Kim, {A. G.} and Kirshner, {R. P.} and E. Kovacs and K. Kuehn and O. Lahav and J. Lee and S. Lee and Lewis, {G. F.} and Li, {T. S.} and C. Lidman and H. Lin and U. Malik and Marshall, {J. L.} and P. Martini and J. Mena-Fern{\'a}ndez and F. Menanteau and R. Miquel and Mohr, {J. J.} and J. Mould and J. Muir and A. M{\"o}ller and E. Neilsen and Nichol, {R. C.} and P. Nugent and Ogando, {R. L. C.} and A. Palmese and Pan, {Y. -C.} and M. Paterno and Percival, {W. J.} and Pereira, {M. E. S.} and A. Pieres and {Plazas Malag{\'o}n}, {A. A.} and B. Popovic and A. Porredon and J. Prat and H. Qu and M. Raveri and M. Rodr{\'i}guez-Monroy and Romer, {A. K.} and A. Roodman and B. Rose and M. Sako and E. Sanchez and {Sanchez Cid}, D. and M. Schubnell and D. Scolnic and I. Sevilla-Noarbe and P. Shah and {Allyn Smith}, J. and M. Smith and M. Soares-Santos and E. Suchyta and M. Sullivan and N. Suntzeff and Swanson, {M. E. C.} and S{\'a}nchez, {B. O.} and G. Tarle and G. Taylor and D. Thomas and C. To and M. Toy and Troxel, {M. A.} and Tucker, {B. E.} and Tucker, {D. L.} and Uddin, {S. A.} and M. Vincenzi and Walker, {A. R.} and N. Weaverdyck and Wechsler, {R. H.} and J. Weller and W. Wester and P. Wiseman and M. Yamamoto and F. Yuan and B. Zhang and Y. Zhang",

note = "Copyright the Author(s) 2024. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

year = "2024",

month = sep,

day = "20",

doi = "10.3847/2041-8213/ad6f9f",

language = "English",

volume = "973",

pages = "1--20",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "Institute of Physics Publishing",

number = "1",

}

DES Collaboration, Abbott, TMC, Acevedo, M, Aguena, M, Alarcon, A, Allam, S, Alves, O, Amon, A, Andrade-Oliveira, F, Annis, J, Armstrong, P, Asorey, J, Avila, S, Bacon, D, Bassett, BA, Bechtol, K, Bernardinelli, PH, Bernstein, GM, Bertin, E, Blazek, J, Bocquet, S, Brooks, D, Brout, D, Buckley-Geer, E, Burke, DL, Camacho, H, Camilleri, R, Campos, A, Carnero Rosell, A, Carollo, D, Carr, A, Carretero, J, Castander, FJ, Cawthon, R, Chang, C, Chen, R, Choi, A, Conselice, C, Costanzi, M, da Costa, LN, Crocce, M, Davis, TM, DePoy, DL, Desai, S, Diehl, HT, Dixon, M, Dodelson, S, Doel, P, Doux, C, Drlica-Wagner, A, Elvin-Poole, J, Everett, S, Ferrero, I, Ferté, A, Flaugher, B, Foley, RJ, Fosalba, P, Friedel, D, Frieman, J, Frohmaier, C, Galbany, L, García-Bellido, J, Gatti, M, Gaztanaga, E, Giannini, G, Glazebrook, K, Graur, O, Gruen, D, Gruendl, RA, Gutierrez, G, Hartley, WG, Herner, K, Hinton, SR, Hollowood, DL, Honscheid, K, Huterer, D, Jain, B, James, DJ, Jeffrey, N, Kasai, E, Kelsey, L, Kent, S, Kessler, R, Kim, AG, Kirshner, RP, Kovacs, E, Kuehn, K, Lahav, O, Lee, J, Lee, S, Lewis, GF, Li, TS, Lidman, C, Lin, H, Malik, U, Marshall, JL, Martini, P, Mena-Fernández, J, Menanteau, F, Miquel, R, Mohr, JJ, Mould, J, Muir, J, Möller, A, Neilsen, E, Nichol, RC, Nugent, P, Ogando, RLC, Palmese, A, Pan, Y-C, Paterno, M, Percival, WJ, Pereira, MES, Pieres, A, Plazas Malagón, AA, Popovic, B, Porredon, A, Prat, J, Qu, H, Raveri, M, Rodríguez-Monroy, M, Romer, AK, Roodman, A, Rose, B, Sako, M, Sanchez, E, Sanchez Cid, D, Schubnell, M, Scolnic, D, Sevilla-Noarbe, I, Shah, P, Allyn Smith, J, Smith, M, Soares-Santos, M, Suchyta, E, Sullivan, M, Suntzeff, N, Swanson, MEC, Sánchez, BO, Tarle, G, Taylor, G, Thomas, D, To, C, Toy, M, Troxel, MA, Tucker, BE, Tucker, DL, Uddin, SA, Vincenzi, M, Walker, AR, Weaverdyck, N, Wechsler, RH, Weller, J, Wester, W, Wiseman, P, Yamamoto, M, Yuan, F, Zhang, B & Zhang, Y 2024, 'The Dark Energy Survey: cosmology results with ∼1500 new high-redshift type Ia supernovae using the full 5 yr data set', Astrophysical Journal Letters, vol. 973, no. 1, L14, pp. 1-20. https://doi.org/10.3847/2041-8213/ad6f9f

TY - JOUR

T1 - The Dark Energy Survey

T2 - cosmology results with ∼1500 new high-redshift type Ia supernovae using the full 5 yr data set

AU - DES Collaboration

AU - Abbott, T. M. C.

AU - Acevedo, M.

AU - Aguena, M.

AU - Alarcon, A.

AU - Allam, S.

AU - Alves, O.

AU - Amon, A.

AU - Andrade-Oliveira, F.

AU - Annis, J.

AU - Armstrong, P.

AU - Asorey, J.

AU - Avila, S.

AU - Bacon, D.

AU - Bassett, B. A.

AU - Bechtol, K.

AU - Bernardinelli, P. H.

AU - Bernstein, G. M.

AU - Bertin, E.

AU - Blazek, J.

AU - Bocquet, S.

AU - Brooks, D.

AU - Brout, D.

AU - Buckley-Geer, E.

AU - Burke, D. L.

AU - Camacho, H.

AU - Camilleri, R.

AU - Campos, A.

AU - Carnero Rosell, A.

AU - Carollo, D.

AU - Carr, A.

AU - Carretero, J.

AU - Castander, F. J.

AU - Cawthon, R.

AU - Chang, C.

AU - Chen, R.

AU - Choi, A.

AU - Conselice, C.

AU - Costanzi, M.

AU - da Costa, L. N.

AU - Crocce, M.

AU - Davis, T. M.

AU - DePoy, D. L.

AU - Desai, S.

AU - Diehl, H. T.

AU - Dixon, M.

AU - Dodelson, S.

AU - Doel, P.

AU - Doux, C.

AU - Drlica-Wagner, A.

AU - Elvin-Poole, J.

AU - Everett, S.

AU - Ferrero, I.

AU - Ferté, A.

AU - Flaugher, B.

AU - Foley, R. J.

AU - Fosalba, P.

AU - Friedel, D.

AU - Frieman, J.

AU - Frohmaier, C.

AU - Galbany, L.

AU - García-Bellido, J.

AU - Gatti, M.

AU - Gaztanaga, E.

AU - Giannini, G.

AU - Glazebrook, K.

AU - Graur, O.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Gutierrez, G.

AU - Hartley, W. G.

AU - Herner, K.

AU - Hinton, S. R.

AU - Hollowood, D. L.

AU - Honscheid, K.

AU - Huterer, D.

AU - Jain, B.

AU - James, D. J.

AU - Jeffrey, N.

AU - Kasai, E.

AU - Kelsey, L.

AU - Kent, S.

AU - Kessler, R.

AU - Kim, A. G.

AU - Kirshner, R. P.

AU - Kovacs, E.

AU - Kuehn, K.

AU - Lahav, O.

AU - Lee, J.

AU - Lee, S.

AU - Lewis, G. F.

AU - Li, T. S.

AU - Lidman, C.

AU - Lin, H.

AU - Malik, U.

AU - Marshall, J. L.

AU - Martini, P.

AU - Mena-Fernández, J.

AU - Menanteau, F.

AU - Miquel, R.

AU - Mohr, J. J.

AU - Mould, J.

AU - Muir, J.

AU - Möller, A.

AU - Neilsen, E.

AU - Nichol, R. C.

AU - Nugent, P.

AU - Ogando, R. L. C.

AU - Palmese, A.

AU - Pan, Y. -C.

AU - Paterno, M.

AU - Percival, W. J.

AU - Pereira, M. E. S.

AU - Pieres, A.

AU - Plazas Malagón, A. A.

AU - Popovic, B.

AU - Porredon, A.

AU - Prat, J.

AU - Qu, H.

AU - Raveri, M.

AU - Rodríguez-Monroy, M.

AU - Romer, A. K.

AU - Roodman, A.

AU - Rose, B.

AU - Sako, M.

AU - Sanchez, E.

AU - Sanchez Cid, D.

AU - Schubnell, M.

AU - Scolnic, D.

AU - Sevilla-Noarbe, I.

AU - Shah, P.

AU - Allyn Smith, J.

AU - Smith, M.

AU - Soares-Santos, M.

AU - Suchyta, E.

AU - Sullivan, M.

AU - Suntzeff, N.

AU - Swanson, M. E. C.

AU - Sánchez, B. O.

AU - Tarle, G.

AU - Taylor, G.

AU - Thomas, D.

AU - To, C.

AU - Toy, M.

AU - Troxel, M. A.

AU - Tucker, B. E.

AU - Tucker, D. L.

AU - Uddin, S. A.

AU - Vincenzi, M.

AU - Walker, A. R.

AU - Weaverdyck, N.

AU - Wechsler, R. H.

AU - Weller, J.

AU - Wester, W.

AU - Wiseman, P.

AU - Yamamoto, M.

AU - Yuan, F.

AU - Zhang, B.

AU - Zhang, Y.

N1 - Copyright the Author(s) 2024. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2024/9/20

Y1 - 2024/9/20

N2 - We present cosmological constraints from the sample of Type Ia supernovae (SNe Ia) discovered and measured during the full 5 yr of the Dark Energy Survey (DES) SN program. In contrast to most previous cosmological samples, in which SNe are classified based on their spectra, we classify the DES SNe using a machine learning algorithm applied to their light curves in four photometric bands. Spectroscopic redshifts are acquired from a dedicated follow-up survey of the host galaxies. After accounting for the likelihood of each SN being an SN Ia, we find 1635 DES SNe in the redshift range 0.10 < z < 1.13 that pass quality selection criteria sufficient to constrain cosmological parameters. This quintuples the number of high-quality z > 0.5 SNe compared to the previous leading compilation of Pantheon+ and results in the tightest cosmological constraints achieved by any SN data set to date. To derive cosmological constraints, we combine the DES SN data with a high-quality external low-redshift sample consisting of 194 SNe Ia spanning 0.025 < z < 0.10. Using SN data alone and including systematic uncertainties, we find ΩM = 0.352 ± 0.017 in flat ΛCDM. SN data alone now require acceleration (q0 < 0 in ΛCDM) with over 5σ confidence. We find (Ωm, w) = (0.264-0.096+0.074, 80-0.16+0.14) in flat wCDM. For flat w0waCDM, we find (ΩM,w0, wa) = (0.495-0.043+0.033, -0.36-0.30+0.36 -8.8-4.5+3.7, consistent with a constant equation of state to within ∼2σ. Including Planck cosmic microwave background, Sloan Digital Sky Survey baryon acoustic oscillation, and DES 3 × 2pt data gives (ΩM, w) = (0.321 ± 0.007, -0.941 ± 0.026). In all cases, dark energy is consistent with a cosmological constant to within ∼2σ. Systematic errors on cosmological parameters are subdominant compared to statistical errors; these results thus pave the way for future photometrically classified SN analyses.

AB - We present cosmological constraints from the sample of Type Ia supernovae (SNe Ia) discovered and measured during the full 5 yr of the Dark Energy Survey (DES) SN program. In contrast to most previous cosmological samples, in which SNe are classified based on their spectra, we classify the DES SNe using a machine learning algorithm applied to their light curves in four photometric bands. Spectroscopic redshifts are acquired from a dedicated follow-up survey of the host galaxies. After accounting for the likelihood of each SN being an SN Ia, we find 1635 DES SNe in the redshift range 0.10 < z < 1.13 that pass quality selection criteria sufficient to constrain cosmological parameters. This quintuples the number of high-quality z > 0.5 SNe compared to the previous leading compilation of Pantheon+ and results in the tightest cosmological constraints achieved by any SN data set to date. To derive cosmological constraints, we combine the DES SN data with a high-quality external low-redshift sample consisting of 194 SNe Ia spanning 0.025 < z < 0.10. Using SN data alone and including systematic uncertainties, we find ΩM = 0.352 ± 0.017 in flat ΛCDM. SN data alone now require acceleration (q0 < 0 in ΛCDM) with over 5σ confidence. We find (Ωm, w) = (0.264-0.096+0.074, 80-0.16+0.14) in flat wCDM. For flat w0waCDM, we find (ΩM,w0, wa) = (0.495-0.043+0.033, -0.36-0.30+0.36 -8.8-4.5+3.7, consistent with a constant equation of state to within ∼2σ. Including Planck cosmic microwave background, Sloan Digital Sky Survey baryon acoustic oscillation, and DES 3 × 2pt data gives (ΩM, w) = (0.321 ± 0.007, -0.941 ± 0.026). In all cases, dark energy is consistent with a cosmological constant to within ∼2σ. Systematic errors on cosmological parameters are subdominant compared to statistical errors; these results thus pave the way for future photometrically classified SN analyses.

UR - http://www.scopus.com/inward/record.url?scp=85207814398&partnerID=8YFLogxK

U2 - 10.3847/2041-8213/ad6f9f

DO - 10.3847/2041-8213/ad6f9f

M3 - Article

AN - SCOPUS:85207814398

SN - 2041-8205

VL - 973

SP - 1

EP - 20

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L14

ER -

The Dark Energy Survey: cosmology results with ∼1500 new high-redshift type Ia supernovae using the full 5 yr data set

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