DESI 2024 VII: cosmological constraints from the full-shape modeling of clustering measurements

Abstract We present cosmological results from the measurement of clustering of galaxy, quasar and Lyman-α forest tracers from the first year of observations with the Dark Energy Spectroscopic Instrument (DESI Data Release 1). We adopt the full-shape (FS) modeling of the power spectrum, including the effects of redshift-space distortions, in an analysis which has been thoroughly validated in a series of supporting papers as summarised in [1]. We combine the full-shape information with DESI's DR1 constraints from the baryon acoustic oscillations (BAO) of these tracers. In the flat ΛCDM cosmological model, DESI (FS+BAO), combined with a baryon density prior from Big Bang Nucleosynthesis and a weak prior on the…

• NS
  National Science Foundation

  Awards: AST-0950945, DE-AC02-07CH11359, DE-AC02-05CH11231, 0950945
• UD
  U.S. Department of Energy

  Awards: -AC02-05CH11231, DE-AC02-07CH11359, 05CH11231, AC02-07CH11359, AC02-05CH11231, DE-AC02, DE-AC02-05CH11231, DE-AC02-
• OO
  Office of Science

  Awards: AC02-05CH11231, -AC02-05CH11231, DE-AC02, DE-AC02-07CH11359
• DO
  Division of Astronomical Sciences

  Award: AST-0950945
• HE
  High Energy Physics

  Award: DE-AC02-05CH11231