Dark Energy Survey Year 3 results: redshift calibration of the MagLim lens sample from the combination of SOMPZ and clustering and its impact on cosmology

Author:

Giannini G123ORCID,Alarcon A4ORCID,Gatti M5,Porredon A67,Crocce M89ORCID,Bernstein G M5ORCID,Cawthon R10ORCID,Sánchez C3,Doux C5ORCID,Elvin-Poole J67ORCID,Raveri M5,Myles J111213ORCID,Lin H14,Amon A1516ORCID,Allam S14,Alves O17,Andrade-Oliveira F18,Baxter E19,Bechtol K20,Becker M R4ORCID,Blazek J21,Camacho H1822,Campos A23,Rosell A Carnero2425,Kind M Carrasco2627,Choi A67ORCID,Cordero J28ORCID,De Vicente J29,DeRose J30,Diehl H T14,Dodelson S2331,Drlica-Wagner A321433,Eckert K5,Fang X3435,Farahi A36ORCID,Fosalba P89ORCID,Friedrich O17,Gruen D37ORCID,Gruendl R A2627,Gschwend J2238,Harrison I39ORCID,Hartley W G38,Huff E M32,Jarvis M5,Krause E40,Kuropatkin N14,Lemos P3941,MacCrann N42,McCullough J14ORCID,Muir J11,Pandey S5,Prat J12ORCID,Rodriguez-Monroy M29,Ross A J6ORCID,Rykoff E S1213,Samuroff S23,Secco L F12,Sevilla-Noarbe I29,Sheldon E43,Troxel M A44,Tucker D L14,Weaverdyck N17ORCID,Yanny B14,Yin B23,Zhang Y4,Abbott T M C45,Aguena M22,Bacon D46,Bertin E4748,Bocquet S35,Brooks D39,Burke D L11,Carretero J3,Castander F J89,Costanzi M495051,da Costa L N22,Pereira M E S52,Desai S53,Doel P39,Ferrero I54,Flaugher B14,Friedel D24,Frieman J1412,García-Bellido J55,Gerdes D W5617,Gutierrez G14,Hinton S R57,Hollowood D L58,Honscheid K67,James D J59,Kent S1431,Kuehn K6061,Lahav O39,Lidman C6263,Lima M6421,Melchior P65,Mena-Fernández J29,Menanteau F2627,Miquel R366,Ogando R L C36,Paterno M14,Paz-Chinchón F2615,Pieres A2236,Malagón A A Plazas65,Roodman A11,Sanchez E29,Scarpine V14,Smith M67,Suchyta E68,Swanson M E C39,Tarle G17,Thomas D46,To C6,Vincenzi M4667,

Affiliation:

1. Department of Astronomy and Astrophysics, University of Chicago , Chicago, IL 60637 , USA

2. Kavli Institute for Cosmological Physics, University of Chicago , Chicago, IL 60637 , USA

3. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra (Barcelona) Spain

4. Argonne National Laboratory , 9700 South Cass Avenue, Lemont, IL 60439 , USA

5. Department of Physics and Astronomy, University of Pennsylvania , Philadelphia, PA 19104 , USA

6. Center for Cosmology and Astro-Particle Physics, The Ohio State University , Columbus, OH 43210 , USA

7. Department of Physics, The Ohio State University , Columbus, OH 43210 , USA

8. Institut d’Estudis Espacials de Catalunya (IEEC) , E-08034 Barcelona , Spain

9. Institute of Space Sciences (ICE , CSIC), Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona , Spain

10. Physics Department, William Jewell College , Liberty, MO 64068 , USA

11. Department of Physics, Stanford University , 382 Via Pueblo Mall, Stanford, CA 94305 , USA

12. Kavli Institute for Particle Astrophysics & Cosmology , PO Box 2450, Stanford University, Stanford, CA 94305 , USA

13. SLAC National Accelerator Laboratory , Menlo Park, CA 94025 , USA

14. Fermi National Accelerator Laboratory , PO Box 500, Batavia, IL 60510 , USA

15. Institute of Astronomy, University of Cambridge , Madingley Road, Cambridge CB3 0HA , UK

16. Kavli Institute for Cosmology, University of Cambridge , Madingley Road, Cambridge CB3 0HA , UK

17. Department of Physics, University of Michigan , Ann Arbor, MI 48109 , USA

18. Instituto de Física Teórica, Universidade Estadual Paulista , São Paulo , Brazil

19. Institute for Astronomy, University of Hawai’i , 2680 Woodlawn Drive, Honolulu, HI 96822 , USA

20. Physics Department, University of Wisconsin-Madison , 2320 Chamberlin Hall, 1150 University Avenue Madison, WI 53706-1390 , USA

21. Department of Physics, Northeastern University , Boston, MA 02115 , USA

22. Laboratório Interinstitucional de e-Astronomia - LIneA , Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400 , Brazil

23. Department of Physics, Carnegie Mellon University , Pittsburgh, PA 15312 , USA

24. Instituto de Astrofisica de Canarias , E-38205 La Laguna, Tenerife , Spain

25. Departamento Astrofísica, Universidad de La Laguna , E-38206 La Laguna, Tenerife , Spain

26. Center for Astrophysical Surveys, National Center for Supercomputing Applications , 1205 West Clark St, Urbana, IL 61801 , USA

27. Department of Astronomy, University of Illinois at Urbana-Champaign , 1002 W. Green Street, Urbana, IL 61801 , USA

28. Jodrell Bank Center for Astrophysics, School of Physics and Astronomy, University of Manchester , Oxford Road, Manchester M13 9PL , UK

29. Centro de Investigaciones Energéticas , Medioambientales y Tecnológicas (CIEMAT), Madrid , Spain

30. Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USA

31. NSF AI Planning Institute for Physics of the Future, Carnegie Mellon University , Pittsburgh, PA 15213 , USA

32. Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Dr, Pasadena, CA 91109 , USA

33. Department of Astronomy, University of California , Berkeley, 501 Campbell Hall, Berkeley, CA 94720 , USA

34. Departments of Statistics and Data Science, University of Texas at Austin , Austin, TX 78757 , USA

35. Faculty of Physics, University Observatory, Ludwig-Maximilians-Universität , Scheinerstr 1, D-81679 Munich , Germany

36. Observatório Nacional , Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400 , Brazil

37. School of Physics and Astronomy, Cardiff University , Cardiff CF24 3AA , UK

38. Department of Astronomy, University of Geneva , ch. d’Écogia 16, CH-1290 Versoix , Switzerland

39. Department of Physics & Astronomy, University College London , Gower Street, London WC1E 6BT , UK

40. Department of Astronomy/Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065 , USA

41. Department of Physics and Astronomy, Pevensey Building, University of Sussex , Brighton BN1 9QH , UK

42. Department of Applied Mathematics and Theoretical Physics, University of Cambridge , Cambridge CB3 0WA , UK

43. Brookhaven National Laboratory , Bldg 510, Upton, NY 11973 , USA

44. Department of Physics, Duke University , Durham NC 27708 , USA

45. Cerro Tololo Inter-American Observatory, NSF’s National Optical-Infrared Astronomy Research Laboratory , Casilla 603, La Serena , Chile

46. Institute of Cosmology and Gravitation, University of Portsmouth , Portsmouth PO1 3FX , UK

47. Institut d’Astrophysique de Paris, CNRS, Sorbonne Université , UMR 7095, F-75014, Paris , France

48. Institut d’Astrophysique de Paris, Sorbonne Universités , UPMC Univ Paris 06, UMR 7095, F-75014 Paris , France

49. Astronomy Unit, Department of Physics, University of Trieste , via Tiepolo 11, I-34131 Trieste , Italy

50. INAF-Osservatorio Astronomico di Trieste , via G. B. Tiepolo 11, I-34143 Trieste , Italy

51. Institute for Fundamental Physics of the Universe , Via Beirut 2, I-34014 Trieste , Italy

52. Hamburger Sternwarte, Universität Hamburg , Gojenbergsweg 112, D-21029 Hamburg , Germany

53. Department of Physics, IIT Hyderabad , Kandi, Telangana 502285 , India

54. Institute of Theoretical Astrophysics, University of Oslo . PO Box 1029 Blindern, NO-0315 Oslo, Norway

55. Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid , E-28049 Madrid , Spain

56. Department of Astronomy, University of Michigan , Ann Arbor, MI 48109 , USA

57. School of Mathematics and Physics, University of Queensland , Brisbane, QLD 4072 , Australia

58. Santa Cruz Institute for Particle Physics , Santa Cruz, CA 95064 , USA

59. Center for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138 , USA

60. Australian Astronomical Optics, Macquarie University , North Ryde, NSW 2113 , Australia

61. Lowell Observatory , 1400 Mars Hill Rd, Flagstaff, AZ 86001 , USA

62. Centre for Gravitational Astrophysics, College of Science, The Australian National University , ACT 2601 , Australia

63. The Research School of Astronomy and Astrophysics, Australian National University , ACT 2601 , Australia

64. Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo , CP 66318, São Paulo, SP 05314-970 , Brazil

65. Department of Astrophysical Sciences, Princeton University , Peyton Hall, Princeton, NJ 08544 , USA

66. Institució Catalana de Recerca i Estudis Avançats , E-08010 Barcelona , Spain

67. School of Physics and Astronomy, University of Southampton , Southampton SO17 1BJ , UK

68. Computer Science and Mathematics Division, Oak Ridge National Laboratory , Oak Ridge, TN 37831 , USA

Abstract

ABSTRACT We present an alternative calibration of the MagLim lens sample redshift distributions from the Dark Energy Survey (DES) first 3 yr of data (Y3). The new calibration is based on a combination of a self-organizing-map-based scheme and clustering redshifts to estimate redshift distributions and inherent uncertainties, which is expected to be more accurate than the original DES Y3 redshift calibration of the lens sample. We describe in detail the methodology, and validate it on simulations and discuss the main effects dominating our error budget. The new calibration is in fair agreement with the fiducial DES Y3 n(z) calibration, with only mild differences (<3σ) in the means and widths of the distributions. We study the impact of this new calibration on cosmological constraints, analysing DES Y3 galaxy clustering and galaxy–galaxy lensing measurements, assuming a Lambda cold dark matter cosmology. We obtain Ωm = 0.30 ± 0.04, σ8 = 0.81 ± 0.07, and S8 = 0.81 ± 0.04, which implies a ∼0.4σ shift in the Ω − S8 plane compared to the fiducial DES Y3 results, highlighting the importance of the redshift calibration of the lens sample in multiprobe cosmological analyses.

Funder

U.S. Department of Energy

National Science Foundation

CNPq

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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