DESI complete calibration of the colour–redshift relation (DC3R2): results from early DESI data

Journal Article · Mon Jun 03 00:00:00 EDT 2024 · Monthly Notices of the Royal Astronomical Society

DOI:https://doi.org/10.1093/mnras/stae1316· OSTI ID:2403619

McCullough, J. ^[1]; Gruen, D. ^[2]; Amon, A. ^[3]; Roodman, A. ^[4]; Masters, D. ^[5]; Raichoor, A. ^[6]; Schlegel, D. ^[6]; Canning, R. ^[7]; Castander, F. J. ^[8]; DeRose, J. ^[6]; Miquel, R. ^[9]; Myles, J. ^[4]; Newman, J. A. ^[10]; Slosar, A. ^[11]; Speagle, J. ^[12]; Wilson, M. J. ^[13]; Aguilar, J. ^[6]; Ahlen, S. ^[14]; Bailey, S. ^[6]; Brooks, D. ^[15] ; Claybaugh, T. ^[6]; Cole, S. ^[13]; Dawson, K. ^[16]; de la Macorra, A. ^[17]; Doel, P. ^[15]; Forero-Romero, J. E. ^[18]; Gontcho A Gontcho, S. ^[6]; Guy, J. ^[6]; Kehoe, R. ^[19]; Kremin, A. ^[6]; Landriau, M. ^[6]; Le Guillou, L. ^[20]; Levi, M. ^[6]; Manera, M. ^[21]; Martini, P. ^[22]; Meisner, A. ^[23]; Moustakas, J. ^[24]; Nie, J. ^[25]; Percival, W. J. ^[26]; Poppett, C. ^[27]; Prada, F. ^[28]; Rezaie, M. ^[29]; Rossi, G. ^[30]; Sanchez, E. ^[31]; Seo, H. ^[32]; Tarlé, G. ^[33]; Weaver, B. A. ^[23]; Zhou, Z. ^[25]; Zou, H. ^[25]

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1. Stanford Univ., CA (United States). Kavli Institute for Particle Astrophysics & Cosmology; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Ludwig Maximilian Univ. of Munich, Munich (Germany); DESI Collaboration. et al.; SLAC
2. Universitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians-Universität München , Scheinerstraße 1, D-81679 München , Germany; Excellence Cluster ORIGINS , Boltzmannstrasse 2, D-85748 Garching , Germany
3. Institute of Astronomy, University of Cambridge , Madingley Road, Cambridge CB3 0HA , UK; Kavli Institute for Cosmology, University of Cambridge , Madingley Road, Cambridge CB3 0HA , UK
4. Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics, Stanford University , Stanford, CA 94305 , USA; SLAC National Accelerator Laboratory , Menlo Park, CA 94025 , USA
5. Infrared Processing and Analysis Center, California Institute of Technology , 1200 E California Blvd, Pasadena, CA 91125 , USA
6. Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USA
7. Institute of Cosmology and Gravitation, Faculty of Technology, University of Portsmouth, Dennis Sciama Building , Portsmouth PO1 3FX , UK
8. Institut d’Estudis Espacials de Catalunya (IEEC) , E-08034 Barcelona , Spain; Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans , E-08193 Barcelona , Spain
9. Institució Catalana de Recerca i Estudis Avançats , E-08010 Barcelona , Spain; Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra (Barcelona) , Spain
10. Department of Physics and Astronomy and PITT PACC, University of Pittsburgh , Pittsburgh, PA 15260 , USA
11. Brookhaven National Laboratory , Upton, NY 11973 , USA
12. Dunlap Institute for Astronomy and Astrophysics, University of Toronto , Toronto M5S 3H4 , Canada
13. Institute for Computational Cosmology, Department of Physics, Durham University , South Road, Durham DH1 3LE , UK
14. Physics Dept., Boston University , 590 Commonwealth Avenue, Boston, MA 02215 , USA
15. Department of Physics and Astronomy, University College London , Gower Street, London WC1E 6BT , UK
16. Department of Physics and Astronomy, The University of Utah , 115 South 1400 East, Salt Lake City, UT 84112 , USA
17. Instituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510 , México
18. Departamento de Física, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio Ip, CP 111711 Bogotá , Colombia
19. Department of Physics, Southern Methodist University , 3215 Daniel Avenue, Dallas, TX 75275 , USA
20. Sorbonne Université, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE) , F-75005 Paris , France
21. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra (Barcelona) , Spain
22. Center for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210 , USA
23. NSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719 , USA
24. Department of Physics and Astronomy, Siena College , 515 Loudon Road, Loudonville, NY 12211 , USA
25. National Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Rd., Chaoyang District, Beijing 100012 , P. R. China
26. Department of Physics and Astronomy, University of Waterloo , 200 University Ave W, Waterloo, ON N2L 3G1 , Canada
27. Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USA; Space Sciences Laboratory, University of California , Berkeley, 7 Gauss Way, Berkeley, CA 94720 , USA
28. Instituto de Astrofísica de Andalucía (CSIC) , Glorieta de la Astronomía, s/n, E-18008 Granada , Spain
29. Department of Physics, Kansas State University , 116 Cardwell Hall, Manhattan, KS 66506 , USA
30. Department of Physics and Astronomy, Sejong University , Seoul 143–747 , Korea
31. CIEMAT , Avenida Complutense 40, E-28040 Madrid , Spain
32. Department of Physics and Astronomy, Ohio University , Athens, OH 45701 , USA
33. Department of Physics, University of Michigan , Ann Arbor, MI 48109 , USA

We present initial results from the Dark Energy Spectroscopic Instrument (DESI) complete calibration of the colour–redshift relation (DC3R2) secondary target survey. Our analysis uses 230 k galaxies that overlap with KiDS-VIKING ugriZYJHK_s photometry to calibrate the colour–redshift relation and to inform photometric redshift (photo-z) inference methods of future weak lensing surveys. Together with emission line galaxies (ELGs), luminous red galaxies (LRGs), and the Bright Galaxy Survey (BGS) that provide samples of complementary colour, the DC3R2 targets help DESI to span 56 percent of the colour space visible to Euclid and LSST with high confidence spectroscopic redshifts. The effects of spectroscopic completeness and quality are explored, as well as systematic uncertainties introduced with the use of common Self-Organizing Maps trained on different photometry than the analysis sample. We further examine the dependence of redshift on magnitude at fixed colour, important for the use of bright galaxy spectra to calibrate redshifts in a fainter photometric galaxy sample. We find that noise in the KiDS-VIKING photometry introduces a dominant, apparent magnitude dependence of redshift at fixed colour, which indicates a need for carefully chosen deep drilling fields, and survey simulation to model this effect for future weak lensing surveys.

• Research Organization: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF); German Research Foundation (DFG)
• Contributing Organization: DESI Collaboration
• Grant/Contract Number: AC02-76SF00515; AC02-05CH11231
• OSTI ID: 2403619
• Alternate ID(s): OSTI ID: 2404350
• Journal Information: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 2 Vol. 531; ISSN 0035-8711
• Publisher: Oxford University Press
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
distance and redshifts
galaxies
gravitational lensing
spectroscopic
surveys