Dark Energy Survey Year 3 results: magnification modelling and impact on cosmological constraints from galaxy clustering and galaxy–galaxy lensing

Author:

Elvin-Poole J123ORCID,MacCrann N4ORCID,Everett S5,Prat J67ORCID,Rykoff E S89,De Vicente J10ORCID,Yanny B11,Herner K11,Ferté A5,Valentino E Di12ORCID,Choi A13,Burke D L89,Sevilla-Noarbe I10,Alarcon A14,Alves O15,Amon A1617,Andrade-Oliveira F15,Baxter E18,Bechtol K19,Becker M R14,Bernstein G M20,Blazek J21,Camacho H2223,Campos A24,Rosell A Carnero232526,Kind M Carrasco2728,Cawthon R29,Chang C67,Chen R30,Cordero J12,Crocce M3132,Davis C8,DeRose J33,Diehl H T11,Dodelson S2434,Doux C35,Drlica-Wagner A6117,Eckert K20,Eifler T F365,Elsner F37,Fang X3836,Fosalba P3132,Friedrich O17,Gatti M20,Giannini G39,Gruen D40,Gruendl R A2728,Harrison I41,Hartley W G42,Huang H3643,Huff E M5,Huterer D15,Krause E36,Kuropatkin N11,Leget P-F8,Lemos P3744,Liddle A R45,McCullough J8,Muir J46,Myles J4789,Navarro-Alsina A48,Pandey S20,Park Y49,Porredon A1250,Raveri M3520,Rodriguez-Monroy M3510,Rollins R P12,Roodman A89,Rosenfeld R5123,Ross A J1,Sánchez C20,Sanchez J11,Secco L F7,Sheldon E52,Shin T53,Troxel M A30,Tutusaus I543132,Varga T N555657,Weaverdyck N1533,Wechsler R H8947,Yin B24,Zhang Y58,Zuntz J50,Aguena M23,Avila S3559,Bacon D60,Bertin E6162,Bocquet S40,Brooks D37,García-Bellido J59,Honscheid K12,Jarvis M20,Li T S63,Mena-Fernández J10,To C1,Wilkinson R D44,

Affiliation:

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

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

3. Department of Physics and Astronomy, University of Waterloo , 200 University Ave W, Waterloo, ON N2L 3G1, Canada

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

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

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

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

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

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

10. Centro de Investigaciones Energéticas , Medioambientales y Tecnológicas (CIEMAT), Madrid, 28040, Spain

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

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

13. California Institute of Technology , 1200 East California Blvd, MC 249-17, Pasadena, CA 91125, USA

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

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

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

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

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

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

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

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

22. Instituto de Física Teórica, Universidade Estadual Paulista , São Paulo, 01140-070, Brazil

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

24. Department of Physics, Carnegie Mellon University , Pittsburgh, Pennsylvania 15312, USA

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

26. Universidad de La Laguna , Dpto. Astrofísica, E-38206 La Laguna, Tenerife, Spain

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

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

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

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

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

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

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

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

35. Université Grenoble Alpes, CNRS , LPSC-IN2P3, F-38000 Grenoble, France

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

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

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

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

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

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

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

43. Department of Physics, University of Arizona , Tucson, AZ 85721, USA

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

45. Instituto de Astrofísica e Ciências do Espaço, Faculdade de Ciências, Universidade de Lisboa , P-1769-016 Lisboa, Portugal

46. Perimeter Institute for Theoretical Physics , 31 Caroline St. North, Waterloo, ON N2L 2Y5, Canada

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

48. Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas , 13083-859, Campinas, SP, Brazil

49. Kavli Institute for the Physics and Mathematics of the Universe (WPI), UTIAS, The University of Tokyo , Kashiwa, Chiba 277-8583, Japan

50. Institute for Astronomy, University of Edinburgh , Edinburgh EH9 3HJ, UK

51. ICTP South American Institute for Fundamental Research Instituto de Física Teórica, Universidade Estadual Paulista , São Paulo, 01140-070, Brazil

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

53. Department of Physics and Astronomy, Stony Brook University , Stony Brook, NY 11794, USA

54. Département de Physique Théorique and Center for Astroparticle Physics, Université de Genève , 24 quai Ernest Ansermet, CH-1211 Geneva, Switzerland

55. Excellence Cluster Origins , Boltzmannstr. 2, D-85748 Garching, Germany

56. Max Planck Institute for Extraterrestrial Physics , Giessenbachstrasse, D-85748 Garching, Germany

57. Universitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians Universität München , Scheinerstr. 1, D-81679 München, Germany

58. George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, and Department of Physics and Astronomy, Texas A&M University , College Station, TX 77843, USA

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

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

61. CNRS , UMR 7095, Institut d’Astrophysique de Paris, F-75014, Paris, France

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

63. Department of Astronomy and Astrophysics, University of Toronto , 50 St. George Street, Toronto ON, M5S 3H4, Canada

Abstract

ABSTRACT We study the effect of magnification in the Dark Energy Survey Year 3 analysis of galaxy clustering and galaxy–galaxy lensing, using two different lens samples: a sample of luminous red galaxies, redMaGiC, and a sample with a redshift-dependent magnitude limit, MagLim. We account for the effect of magnification on both the flux and size selection of galaxies, accounting for systematic effects using the Balrog image simulations. We estimate the impact of magnification on the galaxy clustering and galaxy–galaxy lensing cosmology analysis, finding it to be a significant systematic for the MagLim sample. We show cosmological constraints from the galaxy clustering autocorrelation and galaxy–galaxy lensing signal with different magnifications priors, finding broad consistency in cosmological parameters in ΛCDM and wCDM. However, when magnification bias amplitude is allowed to be free, we find the two-point correlation functions prefer a different amplitude to the fiducial input derived from the image simulations. We validate the magnification analysis by comparing the cross-clustering between lens bins with the prediction from the baseline analysis, which uses only the autocorrelation of the lens bins, indicating that systematics other than magnification may be the cause of the discrepancy. We show that adding the cross-clustering between lens redshift bins to the fit significantly improves the constraints on lens magnification parameters and allows uninformative priors to be used on magnification coefficients, without any loss of constraining power or prior volume concerns.

Funder

NSF

MEC

MICINN

MINECO

STFC

HEFCE

NCSA

KICP

CCAPP

FAPERJ

FINEP

DFG

European Union

European Research Council

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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