DESI DR2 results. II. Measurements of baryon acoustic oscillations and cosmological constraints

We present baryon acoustic oscillation (BAO) measurements from more than 14 million galaxies and quasars drawn from the Dark Energy Spectroscopic Instrument (DESI) Data Release 2 (DR2), based on three years of operation. For cosmology inference, these galaxy measurements are combined with DESI Lyman- α forest BAO results presented in a companion paper (M. Abdul-Karim , companion paper, .). The DR2 BAO results are consistent with DESI DR1 and the Sloan Digital Sky Survey, and their distance-redshift relationship matches those from recent compilations of supernovae (SNe) over the same redshift range. The results are well described by a flat Λ cold dark matter ( Λ CDM ) model, but the parameters preferred…

• NS
  National Science Foundation

  Awards: AST-0950945, DE-AC02-05CH11231, 0950945
• UD
  U.S. Department of Energy

  Awards: -AC02-05CH11231, 05CH11231, AC02-05CH11231, DE-AC02, DE-AC02-05CH11231, DE-AC02-
• NA
  National Aeronautics and Space Administration

  Award: DE-AC02-05CH11231
• GA
  Gordon and Betty Moore Foundation
• CI
  California Institute of Technology
• HF
  Heising-Simons Foundation
• NE
  National Energy Research Scientific Computing Center
• NN
  National Natural Science Foundation of China
• CA
  Chinese Academy of Sciences
• CN
  Consejo Nacional de Ciencia y Tecnología
• MD
  Ministerio de Ciencia e Innovación
• CÀ
  Commissariat à l'Énergie Atomique et aux Énergies Alternatives
• OO
  Office of Science
• JP
  Jet Propulsion Laboratory
• SA
  Science and Technology Facilities Council
• NA
  National Astronomical Observatories, Chinese Academy of Sciences
• DO
  Division of Astronomical Sciences

  Award: AST-0950945
• HE
  High Energy Physics

  Award: DE-AC02-05CH11231
• LB
  Lawrence Berkeley National Laboratory

  Awards: DE-AC02-05CH11231, 05CH11231, AC02-05CH11231