DOE OSTI · 3016043
Dark Energy Survey: DESI-independent angular BAO measurement
Abstract
In this work, we present a measurement of the angular baryon acoustic oscillation (BAO) scale from the completed Dark Energy Survey (DES) dataset excluding the area of overlap with the Dark Energy Spectroscopic Instrument (DESI). We follow the same methodology and validation process as in the DES Y6 BAO analysis. We interpret the impact of this measurement in the context of the statistical preference for 𝑤 0 𝑤 𝑎 cold dark matter (CDM) over ΛCDM when combined with DES Y5 Type Ia supernovae (SN), Planck CMB, and DESI BAO. Based on our previous work, using the full Y6 DES BAO sample, in combination with SN, CMB and DESI data release 1 (DR1) BAO, added 0.3𝜎 in this preference (from 3.7𝜎 to 4.0𝜎), but this ignored possible correlations between datasets. Using our new DESI-independent DES BAO likelihood instead, we find a smaller increase in the statistical preference for 𝑤 0 𝑤 𝑎 CDM, from 3.7𝜎 to 3.8𝜎 when using DESI DR1 BAO, and from 4.0𝜎 to 4.1𝜎 when updating to the more recent DESI data release 2 (DR2) BAO. These significances reduce to 3.1𝜎 when using the new calibrated DES SN-Dovekie. Alongside this work, we publicly release baofit_wtheta, the BAO fitting code for the angular correlation function used in the DES Y6 BAO analysis.
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Mena-Fernández, J. [Université Grenoble Alpes; CNRS; LPSC-; IN2P3; Aix Marseille Univ; CNRS; IN2P3; CPPM] (ORCID:0000000194977266), Avila, S. [Medioambientales y Tecnológicas (CIEMAT)], Porredon, A. [Medioambientales y Tecnológicas (CIEMAT); Ruhr University Bochum], Camacho, H. [Brookhaven National Laboratory; Laboratório Interinstitucional de e-Astronomia—LIneA], Muir, J. [University of Cincinnati; Perimeter Institute for Theoretical Physics], Sanchez, E. [Medioambientales y Tecnológicas (CIEMAT)], Adamow, M. [National Center for Supercomputing Applications], Bechtol, K. [University of Wisconsin-Madison], Camilleri, R. [University of Queensland], Campailla, G. [University of Genova and INFN], Davis, T. M. [University of Queensland], Deiosso, N. [Medioambientales y Tecnológicas (CIEMAT)], Doux, C. [University of Pennsylvania; Université Grenoble Alpes; CNRS; LPSC-; IN2P3], Drlica-Wagner, A. [University of Chicago; Fermi National Accelerator Laboratory; University of Chicago], Ferté, A. [SLAC National Accelerator Laboratory], Gruendl, R. A. [National Center for Supercomputing Applications; University of Illinois at Urbana-Champaign], Hartley, W. G. [University of Geneva], Pieres, A. [Laboratório Interinstitucional de e-Astronomia—LIneA; Observatório Nacional], Raveri, M. [University of Genova and INFN], Rykoff, E. S. [Stanford University; SLAC National Accelerator Laboratory], Sevilla-Noarbe, I. [Medioambientales y Tecnológicas (CIEMAT)], Shah, P. [University College London], Sheldon, E. [Brookhaven National Laboratory], Vincenzi, M. [University of Oxford], Yanny, B. [Fermi National Accelerator Laboratory], Abbott, T. M. C. [Cerro Tololo Inter-American Observatory], Aguena, M. [INAF-Osservatorio Astronomico di Trieste; Laboratório Interinstitucional de e-Astronomia—LIneA], Allam, S. [Fermi National Accelerator Laboratory], Alves, O. [University of Michigan], Andrade-Oliveira, F. [University of Zürich], Annis, J. [Fermi National Accelerator Laboratory], Bacon, D. [University of Portsmouth], Blazek, J. [Northeastern University], Bocquet, S. [University Observatory], Brooks, D. [University College London], Carnero Rosell, A. [Instituto de Astrofisica de Canarias; Laboratório Interinstitucional de e-Astronomia—LIneA; Universidad de La Laguna], Carretero, J. [The Barcelona Institute of Science and Technology], Castander, F. J. [Institut d’Estudis Espacials de Catalunya (IEEC); Institute of Space Sciences (ICE, CSIC)], Cawthon, R. [Oxford College of Emory University], da Costa, L. N. [Laboratório Interinstitucional de e-Astronomia—LIneA], da Silva Pereira, M. E. [Universität Hamburg], De Vicente, J. [Medioambientales y Tecnológicas (CIEMAT)], Desai, S. [IIT Hyderabad], Diehl, H. T. [Fermi National Accelerator Laboratory], Flaugher, B. [Fermi National Accelerator Laboratory], Frieman, J. [University of Chicago; Fermi National Accelerator Laboratory; University of Chicago], García-Bellido, J. [Universidad Autonoma de Madrid], Gatti, M. [University of Chicago], Gruen, D. [University Observatory], Gutierrez, G. [Fermi National Accelerator Laboratory], Herner, K. [Fermi National Accelerator Laboratory], Hinton, S. R. [University of Queensland], Hollowood, D. L. [Santa Cruz Institute for Particle Physics], Honscheid, K. [The Ohio State University; The Ohio State University], Huterer, D. [University of Michigan], Jeffrey, N. [University College London], Kuehn, K. [Macquarie University; Lowell Observatory], Lahav, O. [University College London], Lee, S. [California Institute of Technology], Marshall, J. L. [Texas A&M University], Menanteau, F. [National Center for Supercomputing Applications; University of Illinois at Urbana-Champaign], Miquel, R. [Institució Catalana de Recerca i Estudis Avançats; The Barcelona Institute of Science and Technology], Mohr, J. J. [University Observatory], Myles, J. [Princeton University], Ogando, R. L. C. [Centro de Tecnologia da Informação Renato Archer; Observatório Nacional], Palmese, A. [Carnegie Mellon University], Percival, W. J. [University of Waterloo; Perimeter Institute for Theoretical Physics], Plazas Malagón, A. A. [Stanford University; SLAC National Accelerator Laboratory], Rodriguez-Monroy, M. [Ruhr University Bochum], Roodman, A. [Stanford University; SLAC National Accelerator Laboratory], Samuroff, S. [Northeastern University; The Barcelona Institute of Science and Technology], Sanchez Cid, D. [Medioambientales y Tecnológicas (CIEMAT); University of Zürich], Sánchez, B. O. [Aix Marseille Univ; CNRS; IN2P3; CPPM], Shin, T. [Stony Brook University], Smith, M. [Lancaster University], Soares-Santos, M. [University of Zürich], Suchyta, E. [Oak Ridge National Laboratory], Swanson, M. E. C. [National Center for Supercomputing Applications], Tucker, D. L. [Fermi National Accelerator Laboratory], Vikram, V. [Central University of Kerala], Walker, A. R. [Cerro Tololo Inter-American Observatory], Weaverdyck, N. [University of California; Lawrence Berkeley National Laboratory], Yamamoto, M. [Princeton University; Duke University Durham]. 2026-06-11. Dark Energy Survey: DESI-independent angular BAO measurement. https://doi.org/10.1103/d474-zzzf
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