The WaZP galaxy cluster sample of the dark energy survey year 1

Author:

Aguena M12ORCID,Benoist C13,da Costa L N14,Ogando R L C14ORCID,Gschwend J14,Sampaio-Santos H B14,Lima M15,Maia M A G14,Allam S6,Avila S7,Bacon D8,Bertin E910,Bhargava S11,Brooks D12,Carnero Rosell A1314,Carrasco Kind M1516,Carretero J17,Costanzi M1819,De Vicente J20,Desai S21,Diehl H T6,Doel P12,Everett S22,Evrard A E2324,Ferrero I25,Ferté A26,Flaugher B6,Fosalba P2728,Frieman J629,García-Bellido J7,Giles P11,Gruendl R A1516,Gutierrez G6,Hinton S R30,Hollowood D L22,Honscheid K3132,James D J33,Jeltema T22,Kuehn K3435,Kuropatkin N6,Lahav O12,Melchior P36,Miquel R1737,Morgan R38,Palmese A629,Paz-Chinchón F1639,Plazas A A36,Romer A K11,Sanchez E20,Santiago B140,Schubnell M24,Serrano S2728,Sevilla-Noarbe I20,Smith M41,Soares-Santos M24,Suchyta E42,Tarle G24,To C43,Tucker D L6,Wilkinson R D11

Affiliation:

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

2. Laboratoire d’Annecy De Physique Des Particules (LAPP), 9 Chemin de Bellevue, F-74940 Annecy, France

3. Université Côte d’Azur, OCA, CNRS, Lagrange, UMR 7293, CS 34229, F-06304 Nice Cedex 4, France

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

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

6. Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, IL 60510, USA

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

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

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

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

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

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

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

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

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

16. National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA

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

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

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

20. Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), E-28040 Madrid, Spain

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

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

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

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

25. Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029 Blindern, NO-0315 Oslo, Norway

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

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

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

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

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

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

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

33. Center for Astrophysics, Harvard and Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA

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

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

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

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

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

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

40. Instituto de Física, UFRGS, Caixa Postal 15051, Porto Alegre, RS 91501-970, Brazil

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

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

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

Abstract

ABSTRACT We present a new (2+1)D galaxy cluster finder based on photometric redshifts called Wavelet Z Photometric (WaZP) applied to DES first year (Y1A1) data. The results are compared to clusters detected by the South Pole Telescope (SPT) survey and the redMaPPer cluster finder, the latter based on the same photometric data. WaZP searches for clusters in wavelet-based density maps of galaxies selected in photometric redshift space without any assumption on the cluster galaxy populations. The comparison to other cluster samples was performed with a matching algorithm based on angular proximity and redshift difference of the clusters. It led to the development of a new approach to match two optical cluster samples, following an iterative approach to minimize incorrect associations. The WaZP cluster finder applied to DES Y1A1 galaxy survey (1511.13 deg2 up to mi = 23 mag) led to the detection of 60 547 galaxy clusters with redshifts 0.05 < z < 0.9 and richness Ngals ≥ 5. Considering the overlapping regions and redshift ranges between the DES Y1A1 and SPT cluster surveys, all sz based SPT clusters are recovered by the WaZP sample. The comparison between WaZP and redMaPPer cluster samples showed an excellent overall agreement for clusters with richness Ngals (λ for redMaPPer) greater than 25 (20), with 95 per cent recovery on both directions. Based on the cluster cross-match, we explore the relative fragmentation of the two cluster samples and investigate the possible signatures of unmatched clusters.

Funder

Fundação de Amparo à Pesquisa do Estado de São Paulo

Conselho Nacional de Desenvolvimento Científico e Tecnológico

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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