The Dark Energy Survey Year 3 high-redshift sample: selection, characterization, and analysis of galaxy clustering

Journal Article · 16 August 2023 · Monthly Notices of the Royal Astronomical Society

DOI: https://doi.org/10.1093/mnras/stad2402 · OSTI ID:1998812

Sánchez, C. ; Alarcon, A. ; Bernstein, G. M. ; Sanchez, J.; Pandey, S.; Raveri, M.; Prat, J.; Weaverdyck, N.; Sevilla-Noarbe, I.; Chang, C.; Baxter, E.; Omori, Y.; Jain, B.; Alves, O.; Amon, A.; Bechtol, K.; Becker, M. R.; Blazek, J.; Choi, A.; Campos, A. ; Rosell, A. Carnero; Kind, M. Carrasco; Crocce, M.; Cross, D.; DeRose, J.; Diehl, H. T.; Dodelson, S.; Drlica-Wagner, A.; Eckert, K.; Eifler, T. F.; Elvin-Poole, J.; Everett, S.; Fang, X.; Fosalba, P.; Gruen, D.; Gruendl, R. A.; Harrison, I.; Hartley, W. G.; Huang, H.; Huff, E. M.; Kuropatkin, N.; MacCrann, N.; McCullough, J.; Myles, J.; Krause, E.; Porredon, A.; Rodriguez-Monroy, M.; Rykoff, E. S.; Secco, L. F.; Sheldon, E.; Troxel, M. A.; Yanny, B.; Yin, B.; Zhang, Y.; Zuntz, J.; Abbott, T. M. C.; Aguena, M.; Allam, S.; Andrade-Oliveira, F.; Bertin, E.; Bocquet, S.; Brooks, D.; Burke, D. L.; Carretero, J.; Castander, F. J.; Cawthon, R.; Conselice, C.; Costanzi, M.; Pereira, M. E. S.; Desai, S.; Doel, P.; Doux, C.; Ferrero, I.; Flaugher, B.; Frieman, J.; García-Bellido, J.; Gutierrez, G.; Herner, K.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; James, D. J.; Kuehn, K.; Marshall, J. L.; Mena-Fernández, J.; Menanteau, F.; Miquel, R.; Ogando, R. L. C.; Palmese, A.; Paz-Chinchón, F.; Pieres, A.; Malagón, A. A. Plazas; Sanchez, E.; Scarpine, V.; Schubnell, M.; Smith, M.; Suchyta, E.; Tarle, G.; Thomas, D.; To, C.

ABSTRACT The fiducial cosmological analyses of imaging surveys like DES typically probe the Universe at redshifts z < 1. We present the selection and characterization of high-redshift galaxy samples using DES Year 3 data, and the analysis of their galaxy clustering measurements. In particular, we use galaxies that are fainter than those used in the previous DES Year 3 analyses and a Bayesian redshift scheme to define three tomographic bins with mean redshifts around z ∼ 0.9, 1.2, and 1.5, which extend the redshift coverage of the fiducial DES Year 3 analysis. These samples contain a total of about 9 million galaxies, and their galaxy density is more than 2 times higher than those in the DES Year 3 fiducial case. We characterize the redshift uncertainties of the samples, including the usage of various spectroscopic and high-quality redshift samples, and we develop a machine-learning method to correct for correlations between galaxy density and survey observing conditions. The analysis of galaxy clustering measurements, with a total signal to noise S/N ∼ 70 after scale cuts, yields robust cosmological constraints on a combination of the fraction of matter in the Universe Ωm and the Hubble parameter h, $$\Omega _m h = 0.195^{+0.023}_{-0.018}$$, and 2–3  per cent measurements of the amplitude of the galaxy clustering signals, probing galaxy bias and the amplitude of matter fluctuations, bσ8. A companion paper (in preparation) will present the cross-correlations of these high-z samples with cosmic microwave background lensing from Planck and South Pole Telescope, and the cosmological analysis of those measurements in combination with the galaxy clustering presented in this work.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States); Arizona U.; Arizona U., Astron. Dept. - Steward Observ.; Australian Astron. Observ.; Baltimore, Space Telescope Sci.; Barcelona, Autonoma U.; Barcelona, IEEC; Barcelona, IFAE; Brookhaven National Laboratory (BNL), Upton, NY (United States); Caltech, JPL; Cambridge U.; Cambridge U., DAMTP; Cambridge U., KICC; Cardiff U.; Carnegie Mellon U.; Cerro-Tololo InterAmerican Obs.; Chicago U., Astron. Astrophys. Ctr.; Chicago U., EFI; Chicago U., KICP; Duke U.; Edinburgh U., Inst. Astron.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Geneva Observ.; Hamburg Observ.; Harvard-Smithsonian Ctr. Astrophys.; IAC, La Laguna; ICREA, Barcelona; IFPU, Trieste; INFN, Genoa; INFN, Trieste; Illinois U., Urbana, Astron. Dept.; Indian Inst. Tech., Hyderabad; Inst. Astron., Honolulu; Inst. Theor. Astrophys., Oslo; Jodrell Bank; LIneA, Rio de Janeiro; LPSC, Grenoble; Laguna U., Tenerife; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Lowell Observ.; Madrid, CIEMAT; Madrid, Escuela Tec. Sup. Ing. Ind.; Madrid, IFT; Munich U. Observ.; NASA, Goddard; NCSA, Urbana; Northeastern U.; Nottingham U.; Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Ohio State U.; Ohio State U., CCAPP; Paris, Inst. Astrophys.; Pennsylvania U.; Portsmouth U., ICG; Princeton U., Astrophys. Sci. Dept.; Queensland U.; Rio de Janeiro Observ.; SISSA, Trieste; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Southampton U.; Stanford U.; Texas A-M; Trieste Observ.; U. Michigan, Ann Arbor; UC, Berkeley, Astron. Dept.; UC, Santa Cruz; University Coll. London; University of Michigan, Ann Arbor, MI (United States); Waterloo U.; William-Mary Coll.; Wisconsin U., Madison
• Sponsoring Organization: National Science Foundation (NSF); US Department of Energy; USDOE; USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Contributing Organization: DES Collaboration
• Grant/Contract Number: 89243024CSC000002; AC02-05CH11231; AC02-06CH11357; AC02-07CH11359; AC05-00OR22725; SC0007901; SC0019193
• OSTI ID: 1998812
• Report Number(s): FERMILAB-PUB--22-877-PPD; FERMILAB-PUB-22-877-PPD; arXiv:2211.16593
• Journal Information: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 3 Vol. 525; ISSN 0035-8711
• Publisher: Oxford University PressCopyright Statement
• Country of Publication: United Kingdom
• Language: English