DOE OSTI · 3005313
The Dark Energy Survey supernova program: a reanalysis of cosmology results and evidence for evolving dark energy with an updated Type Ia supernova calibration
Abstract
We present improved cosmological constraints from a re-analysis of the Dark Energy Survey (DES) 5-year sample of Type Ia supernovae (DES-SN5YR). This re-analysis includes an improved photometric cross-calibration, recent white dwarf observations to cross-calibrate between DES and low-redshift surveys, retraining the salt3 light-curve model and fixing a numerical approximation in the host-galaxy colour law. Our fully recalibrated sample, which we call DES-Dovekie, comprises ~1600 likely Type Ia SNe from DES and ~200 low-redshift SNe from other surveys. With DES-Dovekie, we obtain Ω m = 0.330 ± 0.015 in flat Lambda-cold dark matter (ΛCDM) which changes Ω m by –0.022 compared to DES-SN5YR. Combining DES-Dovekie with cosmic microwave background data from Planck, Atacama Cosmology Telescope, and South Pole Telescope and the DESI DR2 measurements in a flat CDM cosmology, we find ω 0 = –0.803 ± 0.054 and ω a = –0.72 ± 0.21. Our results hold a significance of 3.2σ, reduced from 4.2σ for DES-SN5YR, to reject the null hypothesis that the data are compatible with the cosmological constant. This significance is equivalent to a Bayesian model preference odds of approximately 5:1 in favour of the flat ω 0 ω a CDM model. Using generally accepted thresholds for model preference, our updated data exhibits only a weak preference for evolving dark energy.
Explore related subjects
Keep this discovery
Popovic, B [Universite Claude Bernard Lyon 1 , CNRS, IP2I Lyon/IN2P3, IMR 5822, F-69622 Villeurbanne ,; School of Physics and Astronomy, University of Southampton , Southampton SO17 1BJ ,] (ORCID:0000000280126978), Shah, P [University College London Department of Physics & Astronomy, , Gower Street, London WC1E 6BT ,], Kenworthy, W D [Stockholm University The Oskar Klein Centre, Department of Physics, , SE-106 91 Stockholm ,], Kessler, R [University of Chicago Department of Astronomy and Astrophysics, , Chicago, IL 60637 ,; Kavli Institute for Cosmological Physics, University of Chicago , Chicago, IL 60637 ,], Davis, T M [School of Mathematics and Physics, University of Queensland , Brisbane, QLD 4072 ,] (ORCID:0000000242138783), Goobar, A [Stockholm University The Oskar Klein Centre, Department of Physics, , SE-106 91 Stockholm ,] (ORCID:0000000241634996), Scolnic, D [Durham Department of Physics, Duke University, , NC 27708 ,] (ORCID:0000000249345849), Vincenzi, M [Denys Wilkinson Building Department of Physics, University of Oxford, , Keble Road, Oxford OX1 3RH ,] (ORCID:0000000187881688), Wiseman, P [School of Physics and Astronomy, University of Southampton , Southampton SO17 1BJ ,] (ORCID:0000000230731512), Chen, R [Durham Department of Physics, Duke University, , NC 27708 ,] (ORCID:0000000339170966), Charleton, E [School of Physics and Astronomy, University of Southampton , Southampton SO17 1BJ ,], Acevedo, M [Durham Department of Physics, Duke University, , NC 27708 ,], Armstrong, P [The Research School of Astronomy and Astrophysics, Australian National University, Canberra , ACT 2601 ,], Boyd, B M [Institute of Astronomy and Kavli Institute for Cosmology, Madingley Road , Cambridge CB3 0HA ,] (ORCID:0000000206221117), Brout, D [Center for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138 ,], Camilleri, R [School of Mathematics and Physics, University of Queensland , Brisbane, QLD 4072 ,], Frieman, J [Fermi National Accelerator Laboratory (FNAL) , PO Box 500, Batavia, IL 60510 ,], Galbany, L [Institute of Space Sciences (ICE, CSIC), Campus UAB , Carrer de Can Magrans, s/n, E-08193 Barcelona ,; Institut d’Estudis Espacials de Catalunya (IEEC) , E-08034 Barcelona ,] (ORCID:0000000212966887), Grayling, M [Institute of Astronomy and Kavli Institute for Cosmology, Madingley Road , Cambridge CB3 0HA ,], Kelsey, L [Institute of Astronomy and Kavli Institute for Cosmology, Madingley Road , Cambridge CB3 0HA ,] (ORCID:0000000303130487), Rose, B [Baylor University Department of Physics and Astronomy, , One Bear Place 97316, Waco, TX 76798-7316 ,], Sánchez, B [Université Grenoble Alpes , CNRS, LPSC-IN2P3, F-38000 Grenoble ,], Lee, J [University of Pennsylvania Department of Physics and Astronomy, , Philadelphia, PA 19104 ,], Möller, A [Centre for Astrophysics & Supercomputing, Swinburne University of Technology, Swinburne , VIC 3122 ,], Smith, M [Lancaster University Department of Physics, , Lancs LA1 4YB ,] (ORCID:0000000233211432), Sullivan, M [School of Physics and Astronomy, University of Southampton , Southampton SO17 1BJ ,] (ORCID:0000000190534820), Shiamtanis, N [School of Physics and Astronomy, University of Southampton , Southampton SO17 1BJ ,], Alarcon, A [Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n , E-08193 Barcelona ,], Allam, S S [Fermi National Accelerator Laboratory (FNAL) , PO Box 500, Batavia, IL 60510 ,], Andrade-Oliveira, F [Physik-Institut, University of Zürich, Winterthurerstrasse 190 , CH-8057 Zürich ,], Avila, S [Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) , Madrid, 28040 ,], Bacon, D [Institute of Cosmology and Gravitation, University of Portsmouth , Portsmouth PO1 3FX ,], Blazek, J [Northeastern University Department of Physics, , Boston, MA 02115 ,], Bocquet, S [LMU Faculty of Physics, University Observatory , Scheinerstr. 1, D-81679 Munich ,], Brooks, D [University College London Department of Physics & Astronomy, , Gower Street, London WC1E 6BT ,], Burke, D L [Kavli Institute for Particle Astrophysics & Cosmology , Stanford University, PO Box 2450, Stanford, CA 94305 ,; SLAC National Accelerator Laboratory , Menlo Park, CA 94025 ,], Rosell, A Carnero [Instituto de Astrofisica de Canarias , E-38205 La Laguna, Tenerife ,; Laboratório Interinstitucional de e-Astronomia – LIneA, Av. Pastor Martin Luther King Jr , 126 Del Castilho, Nova América Offices, Torre 3000/sala 817 CEP: 20765-000 ,] (ORCID:0000000330445150), Carretero, J [Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra (Barcelona) ,] (ORCID:0000000231300204), Cawthon, R [Oxford College of Emory University , Oxford, GA 30054 ,] (ORCID:0000000329656786), da Costa, L N [Laboratório Interinstitucional de e-Astronomia – LIneA, Av. Pastor Martin Luther King Jr , 126 Del Castilho, Nova América Offices, Torre 3000/sala 817 CEP: 20765-000 ,], Pereira, M E da Silva [Hamburger Sternwarte, Universität Hamburg , Gojenbergsweg 112, D-21029 Hamburg ,] (ORCID:0000000271317684), Diehl, H T [Fermi National Accelerator Laboratory (FNAL) , PO Box 500, Batavia, IL 60510 ,], Dodelson, S [University of Chicago Department of Astronomy and Astrophysics, , Chicago, IL 60637 ,; Kavli Institute for Cosmological Physics, University of Chicago , Chicago, IL 60637 ,; Fermi National Accelerator Laboratory (FNAL) , PO Box 500, Batavia, IL 60510 ,], Doel, P [University College London Department of Physics & Astronomy, , Gower Street, London WC1E 6BT ,], Everett, S [California Institute of Technology , 1200 East California Blvd, MC 249-17, Pasadena, CA 91125 ,], Frohmaier, C [Institute of Cosmology and Gravitation, University of Portsmouth , Portsmouth PO1 3FX ,] (ORCID:0000000195534723), García-Bellido, J [Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid , E-28049 Madrid ,] (ORCID:0000000293708360), Gruen, D [LMU Faculty of Physics, University Observatory , Scheinerstr. 1, D-81679 Munich ,], Gutierrez, G [Fermi National Accelerator Laboratory (FNAL) , PO Box 500, Batavia, IL 60510 ,], Herner, K [Fermi National Accelerator Laboratory (FNAL) , PO Box 500, Batavia, IL 60510 ,], Hinton, S R [School of Mathematics and Physics, University of Queensland , Brisbane, QLD 4072 ,] (ORCID:0000000320719349), Hollowood, D L [Santa Cruz Institute for Particle Physics , Santa Cruz, CA 95064 ,] (ORCID:0000000293694157), Honscheid, K [Center for Cosmology and Astro-Particle Physics, The Ohio State University , Columbus, OH 43210 ,; The Ohio State University Department of Physics, , Columbus, OH 43210 ,], Huterer, D [University of Michigan Department of Physics, , Ann Arbor, MI 48109 ,], James, D J [Center for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138 ,; Australian Astronomical Optics, Macquarie University , North Ryde, NSW 2113 ,], Jeffrey, N [University College London Department of Physics & Astronomy, , Gower Street, London WC1E 6BT ,], Kuehn, K [Center for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138 ,; Australian Astronomical Optics, Macquarie University , North Ryde, NSW 2113 ,; Lowell Observatory , 1400 Mars Hill Rd, Flagstaff, AZ 86001 ,], Lahav, O [University College London Department of Physics & Astronomy, , Gower Street, London WC1E 6BT ,], Lee, S [Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Dr, Pasadena, CA 91109 ,; Centre for Gravitational Astrophysics, College of Science, The Australian National University, Canberra , ACT 2601 ,], Lidman, C [The Research School of Astronomy and Astrophysics, Australian National University, Canberra , ACT 2601 ,; Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Dr, Pasadena, CA 91109 ,; Centre for Gravitational Astrophysics, College of Science, The Australian National University, Canberra , ACT 2601 ,] (ORCID:0000000317310497), Marshall, J L [Texas A&M University George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, and Department of Physics and Astronomy, , College Station, TX 77843 ,], Mena-Fernández, J [Université Grenoble Alpes , CNRS, LPSC-IN2P3, F-38000 Grenoble ,], Menanteau, F [Center for Astrophysical Surveys, National Center for Supercomputing Applications , 1205 West Clark St., Urbana, IL 61801 ,; University of Illinois at Urbana-Champaign Department of Astronomy, , 1002 W. Green Street, Urbana, IL 61801 ,], Miquel, R [Institució Catalana de Recerca i Estudis Avançats , E-08010 Barcelona ,; Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra (Barcelona) ,], Muir, J [University of Cincinnati Department of Physics, , Cincinnati, Ohio 45221 ,; Perimeter Institute for Theoretical Physics , 31 Caroline St. North, Waterloo, ON N2L 2Y5 ,], Myles, J [Peyton Hall Department of Astrophysical Sciences, Princeton University, , Princeton, NJ 08544 ,], Ogando, R L C [Centro de Tecnologia da Informação Renato Archer , Campinas, SP-13069-901 ,; Observatório Nacional , Rio de Janeiro, RJ-20921-400 ,], Paterno, M [Fermi National Accelerator Laboratory (FNAL) , PO Box 500, Batavia, IL 60510 ,], Malagón, A A Plazas [Kavli Institute for Particle Astrophysics & Cosmology , Stanford University, PO Box 2450, Stanford, CA 94305 ,; SLAC National Accelerator Laboratory , Menlo Park, CA 94025 ,] (ORCID:0000000225980514), Porredon, A [Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) , Madrid, 28040 ,; Faculty of Physics and Astronomy, Astronomical Institute, German Centre for Cosmological Lensing, Ruhr University Bochum , D-44780 Bochum ,], Prat, J [University of Chicago Department of Astronomy and Astrophysics, , Chicago, IL 60637 ,; Nordita, KTH Royal Institute of Technology and Stockholm University, Hannes Alfvéns väg 12 , SE-10691 Stockholm ,] (ORCID:0000000259335150), Nichol, R C [School of Mathematics and Physics, University of Surrey , Guildford, Surrey ,], Romer, A K [University of Sussex Department of Physics and Astronomy, Pevensey Building, , Brighton BN1 9QH ,], Roodman, A [Kavli Institute for Particle Astrophysics & Cosmology , Stanford University, PO Box 2450, Stanford, CA 94305 ,; SLAC National Accelerator Laboratory , Menlo Park, CA 94025 ,], Sanchez, E [Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) , Madrid, 28040 ,], Cid, D Sanchez [Physik-Institut, University of Zürich, Winterthurerstrasse 190 , CH-8057 Zürich ,; Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) , Madrid, 28040 ,], Sevilla-Noarbe, I [Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) , Madrid, 28040 ,], Suchyta, E [Center for Astrophysical Surveys, National Center for Supercomputing Applications , 1205 West Clark St., Urbana, IL 61801 ,; Computer Science and Mathematics Division, Oak Ridge National Laboratory , Oak Ridge, TN 37831 ,] (ORCID:0000000270479358), Swanson, M E C [Center for Astrophysical Surveys, National Center for Supercomputing Applications , 1205 West Clark St., Urbana, IL 61801 ,], To, C [University of Chicago Department of Astronomy and Astrophysics, , Chicago, IL 60637 ,], Tucker, D L [Fermi National Accelerator Laboratory (FNAL) , PO Box 500, Batavia, IL 60510 ,], Walker, A R [Cerro Tololo Inter-American Observatory, NSF’s National Optical-Infrared Astronomy Research Laboratory , Casilla 603, La Serena ,] (ORCID:0000000271238943), Weaverdyck, N [University of California Berkeley Center for Cosmological Physics, Department of Physics, , Berkeley, CA 94720 ,; US Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 ,] (ORCID:0000000193825199), Aguena, M [Laboratório Interinstitucional de e-Astronomia – LIneA, Av. Pastor Martin Luther King Jr , 126 Del Castilho, Nova América Offices, Torre 3000/sala 817 CEP: 20765-000 ,; INAF – Osservatorio Astronomico di Trieste , via G. B. Tiepolo 11, I-34143 Trieste ,]. 2026-04-14. The Dark Energy Survey supernova program: a reanalysis of cosmology results and evidence for evolving dark energy with an updated Type Ia supernova calibration. https://doi.org/10.1093/mnras/stag632
Cite the original work for its findings. Save a collection to share your selection of sources.
Discover connections
Connections use source metadata and explicit phrase matches, not verified experimental comparisons.