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Dark Energy Camera All Data Everywhere cosmic shear project. V. Constraints on cosmology and astrophysics from 270 million galaxies across $13,000 \deg^{2}$ of the sky

D. Anbajagane ^1,2,3,*, C. Chang^1,2,3,†, A. Drlica-Wagner ^4,1,2,3, C. Y. Tan ^5,2, M. Adamow^6,7, R. A. Gruendl^6,7, L. F. Secco², Z. Zhang^1,8,9, M. R. Becker¹⁰ et al.

P. S. Ferguson¹¹, N. Chicoine^1,12, K. Herron¹³, A. Alarcon¹⁴, R. Teixeira^1,15, D. Suson¹⁶, A. J. Shajib^1,2,17, J. A. Frieman^1,2,9,18, A. N. Alsina¹⁹, A. Amon²⁰, F. Andrade-Oliveira²¹, J. Blazek²², C. R. Bom²³, H. Camacho²⁴, J. A. Carballo-Bello²⁵, A. Carnero Rosell^26,27,28, R. Cawthon²⁹, W. Cerny³⁰, A. Choi³¹, Y. Choi³², S. Dodelson^2,4,1, C. Doux³³, K. Eckert³⁴, J. Elvin-Poole³⁵, J. Esteves³⁶, M. Gatti², G. Giannini², D. Gruen³⁷, W. G. Hartley³⁸, K. Herner⁴, E. M. Huff³⁹, B. Jain³⁴, D. J. James^40,41, M. Jarvis³⁴, E. Krause⁴², N. Kuropatkin⁴, C. E. Martínez-Vázquez⁴³, P. Massana⁴⁴, S. Mau^8,18, J. McCullough⁴⁵, G. E. Medina^46,47, B. Mutlu-Pakdil¹³, J. Myles²⁰, M. Navabi⁴⁸, N. E. D. Noël⁴⁸, A. B. Pace⁴⁹, S. Pandey^50,51, A. Porredon⁵², J. Prat⁵³, M. Raveri⁵⁴, A. H. Riley⁵⁵, E. S. Rykoff^9,18, J. D. Sakowska⁴⁸, S. Samuroff⁵⁶, D. Sanchez-Cid^57,21, D. J. Sand⁵⁸, L. Santana-Silva²³, I. Sevilla-Noarbe⁵², T. Shin⁵⁹, M. Soares-Santos²¹, G. S. Stringfellow⁶⁰, C. To^2,3, E. J. Tollerud⁶¹, A. Tong³⁴, M. A. Troxel¹⁵, A. K. Vivas⁶², M. Yamamoto²⁰, B. Yanny⁶³, B. Yin¹⁵, A. Zenteno⁶², Y. Zhang⁶⁴, and J. Zuntz⁶⁵

¹Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637, USA
²Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA1
³NSF-Simons AI Institute for the Sky (SkAI), 172 E. Chestnut Street, Chicago, Illinois 60611, USA
⁴Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, Illinois 60510, USA
⁵Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
⁶Center for Astrophysical Surveys, National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, Illinois 61801, USA
⁷Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, Illinois 61801, USA
⁸Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, California 94305, USA
⁹SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
¹⁰Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, USA
¹¹DIRAC Institute, Department of Astronomy, University of Washington, 3910 15th Avenue NE, Seattle, Washington, 98195, USA
¹²Department of Physics and Astronomy, University of Pittsburgh, 3941 O’Hara Street, Pittsburgh, Pennsylvania 15260
¹³Department of Physics and Astronomy, Dartmouth College, Hanover, New Hampshire 03755, USA
¹⁴Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, Spain
¹⁵Department of Physics, Duke University Durham, North Carolina 27708, USA
¹⁶Department of Chemistry and Physics, Purdue University Northwest 2200, 169th Avenue, Hammond, Indiana 46323, USA
¹⁷Center for Astronomy, Space Science and Astrophysics, Independent University, Bangladesh, Dhaka 1229, Bangladesh
¹⁸Kavli Institute for Particle Astrophysics and Cosmology, P.O. Box 2450, Stanford University, Stanford, California 94305, USA
¹⁹Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, 13083-859, Campinas, SP, Brazil
²⁰Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, New Jersey 08544, USA
²¹Physik-Institut, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
²²Department of Physics, Northeastern University, Boston, MA 02115, USA
²³Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, 22290-180 Rio de Janeiro, RJ, Brazil
²⁴Physics Department, Brookhaven National Laboratory, Upton, New York 11973
²⁵Instituto de Alta Investigación, Universidad de Tarapacá, Casilla 7D, Arica, Chile
²⁶Universidad de La Laguna, Dpto. Astrofísica, E-38206 La Laguna, Tenerife, Spain
²⁷Instituto de Astrofisica de Canarias, E-38205 La Laguna, Tenerife, Spain
²⁸Laboratório Interinstitucional de e-Astronomia-LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil
²⁹Physics Department, William Jewell College, Liberty, Missouri 64068, USA
³⁰Department of Astronomy, Yale University, New Haven, Connecticut 06520, USA
³¹NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, Maryland 20771, USA
³²NSF National Optical-Infrared Astronomy Research Laboratory, 950 North Cherry Avenue, Tucson, Arizona 85719, USA
³³Université Grenoble Alpes, CNRS, LPSC-IN2P3, 38000 Grenoble, France
³⁴Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
³⁵Department of Physics and Astronomy, University of Waterloo, 200 University Avenue W, Waterloo, Ontario N2L 3G1, Canada
³⁶Department of Physics, Harvard University, Massachusetts 02138, USA
³⁷University Observatory, Faculty of Physics, Ludwig-Maximilians-Universität, Scheinerstrasse 1, 81679 Munich, Germany; Excellence Cluster ORIGINS, Boltzmannstr. 2, 85748 Garching, Germany
³⁸Department of Astronomy, University of Geneva, ch. d’Ecogia 16, 1290 Versoix, Switzerland
³⁹Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, California 91109, USA
⁴⁰Applied Materials Inc., 35 Dory Road, Gloucester, Massachusetts 01930
⁴¹ASTRAVEO LLC, PO Box 1668, Gloucester, Massachusetts 01931
⁴²Department of Astronomy/Steward Observatory, University of Arizona, Tucson, Arizona 85721, USA
⁴³International Gemini Observatory/NSF NOIRLab, 670 N. A’ohoku Place, Hilo, Hawai’i, 96720, USA
⁴⁴NSF’s NOIRLab, Casilla 603, La Serena, Chile
⁴⁵Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, New Jersey USA 08544
⁴⁶Dunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 St George Street, Toronto, Ontario M5S 3H4, Canada
⁴⁷David A. Dunlap Department of Astronomy and Astrophysics, University of Toronto, 50 St George Street, Toronto, Ontario M5S 3H4, Canada
⁴⁸Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
⁴⁹Department of Astronomy, University of Virginia, 530 McCormick Road, Charlottesville, Virginia 22904, USA
⁵⁰Department of Physics, Columbia University, 538 West 120th Street, New York, New York USA 10027, USA
⁵¹Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, New York 10027, USA
⁵²Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
⁵³Nordita, KTH Royal Institute of Technology and Stockholm University, SE-106 91 Stockholm, Sweden
⁵⁴Department of Physics and INFN, University of Genova, Genova, Italy
⁵⁵Institute for Computational Cosmology, Department of Physics, Durham University, South Road, Durham DH1 3LE, United Kingdom
⁵⁶Institut de Física d’Altes Energies, The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra (Barcelona) Spain
⁵⁷Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
⁵⁸Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, Arizona 85721-0065, USA
⁵⁹Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
⁶⁰Center for Astrophysics and Space Astronomy, University of Colorado, 389 UCB, Boulder, Colorado 80309-0389, USA
⁶¹Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218, USA
⁶²Cerro Tololo Inter-American Observatory/NSF NOIRLab, Casilla 603, La Serena, Chile
⁶³Fermi National Accelerator Laboratory, PO Box 500, Batavia, Illinois, 60510, USA
⁶⁴NSF National Optical-Infrared Astronomy Research Laboratory, 950 N Cherry Avenue, Tucson, Arizona 85719
⁶⁵Institute for Astronomy, University of Edinburgh, Edinburgh EH9 3HJ, United Kingdom

^*Contact author: dhayaa@uchicago.edu
^†Contact author: chihway@kicp.uchicago.edu

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Phys. Rev. D 114, 043527 – Published 17 August, 2026

DOI: https://doi.org/10.1103/k4lq-2s73

Abstract

We present constraints on models of cosmology and astrophysics using cosmic shear data vectors from three datasets: the northern and southern Galactic cap of the Dark Energy Camera All Data Everywhere (DECADE) project, and the Dark Energy Survey (DES) Year 3. These data vectors combined consist of 270 million galaxies spread across $13, 000 \deg^{2}$ of the sky. We first extract constraints for $Λ CDM$ cosmology and find $S_{8} = 0.80 5_{- 0.019}^{+ 0.019}$ and $Ω_{m} = 0.26 2_{- 0.036}^{+ 0.023}$ , which is consistent within $1.9 σ$ of constraints from the Planck satellite. Extending our analysis to dynamical dark energy models shows that lensing provides some (but still minor) improvements to existing constraints from supernovae and baryon acoustic oscillations. Finally, we study six different models for the impact of baryons on the matter power spectrum. We show the different models provide consistent constraints on baryon suppression, and associated cosmology, once the astrophysical priors are sufficiently wide. Current scale-cut approaches for mitigating baryon contamination result in a residual bias of $\approx 0.3 σ$ in the $S_{8}, Ω_{m}$ posterior. Using all scales with dedicated baryon modeling leads to negligible improvement as the new information is used solely to self-calibrate the baryon model on small scales. Additional nonlensing datasets, and/or calibrations of the baryon model, will be required to access the full statistical power of the lensing measurements. The combined dataset in this work represents the largest lensing dataset to date (most galaxies, largest area) and provides an apt testing ground for analyses of upcoming datasets from stage IV surveys. The DECADE shear catalogs, data vectors, likelihoods, etc. are made publicly available.