Dark Energy Survey Year 1 results: validation of weak lensing cluster member contamination estimates from P(z) decomposition

Journal Article · Thu Aug 08 00:00:00 EDT 2019 · Monthly Notices of the Royal Astronomical Society

DOI:https://doi.org/10.1093/mnras/stz2185· OSTI ID:1560741

Varga, T. N. ^[1]; DeRose, J. ^[2]; Gruen, D.  ^[2]; McClintock, T.  ^[3]; Seitz, S. ^[1]; Rozo, E. ^[4]; Costanzi, M. ^[5]; Hoyle, B. ^[1]; MacCrann, N. ^[6]; Plazas, A. A. ^[7]; Rykoff, E. S. ^[8]; Simet, M. ^[9]; von der Linden, A. ^[10]; Wechsler, R. H. ^[2]; Annis, J. ^[11]; Avila, S. ^[12]; Bertin, E. ^[13]; Brooks, D. ^[14]; Buckley-Geer, E. ^[11]; Burke, D. L. ^[8] ; Carnero Rosell, A. ^[15]; Carrasco Kind, M. ^[16]; Carretero, J. ^[17]; Cunha, C. E. ^[18]; D’Andrea, C. B. ^[19]; da Costa, L. N. ^[20]; De Vicente, J. ^[21]; Desai, S. ^[22]; Diehl, H. T. ^[11]; Dietrich, J. P. ^[23]; Doel, P. ^[14]; Evrard, A. E. ^[24]; Flaugher, B. ^[11]; Fosalba, P. ^[25]; Frieman, J. ^[26]; García-Bellido, J. ^[27]; Gaztanaga, E. ^[25]; Gerdes, D. W. ^[24]; Gruendl, R. A. ^[16]; Gschwend, J. ^[20]; Gutierrez, G. ^[11]; Hartley, W. G. ^[28]; Hollowood, D. L. ^[29]; Honscheid, K. ^[6]; James, D. J. ^[30]; Jeltema, T. ^[29]; Kuehn, K. ^[31]; Kuropatkin, N. ^[11]; Lima, M. ^[32]; Maia, M. A. G. ^[20]; March, M. ^[19]; Marshall, J. L. ^[33]; Melchior, P. ^[34]; Menanteau, F. ^[16]; Miller, C. J. ^[24]; Miquel, R. ^[35]; Ogando, R. L. C. ^[20]; Romer, A. K. ^[36]; Sanchez, E. ^[21]; Scarpine, V. ^[11]; Schubnell, M. ^[37]; Serrano, S. ^[25]; Sevilla-Noarbe, I. ^[21]; Smith, M. ^[38]; Sobreira, F. ^[39]; Suchyta, E. ^[40]; Swanson, M. E. C. ^[41]; Tarle, G. ^[37]; Thomas, D. ^[12]; Tucker, D. L. ^[11]; Zhang, Y. ^[11]

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1. Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, D-85748 Garching, Germany, Fakultät für Physik, Universitäts-Sternwarte, Ludwig−Maximilians Universität München, Scheinerstr. 1, D-81679 München, Germany
2. Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305, USA, Kavli Institute for Particle Astrophysics and Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
3. Brookhaven National Laboratory, Bldg 510, Upton, NY 11973, USA
4. Department of Physics, University of Arizona, Tucson, AZ 85721, USA
5. Fakultät für Physik, Universitäts-Sternwarte, Ludwig−Maximilians Universität München, Scheinerstr. 1, D-81679 München, Germany
6. Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USA, Department of Physics, The Ohio State University, Columbus, OH 43210, USA
7. Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA
8. Kavli Institute for Particle Astrophysics and Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
9. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA, University of California, Riverside, 900 University Avenue, Riverside, CA 92521, USA
10. Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794, USA
11. Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA
12. Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 3FX, UK
13. CNRS, UMR 7095, Institut d’Astrophysique de Paris, F-75014, Paris, France, Institut d’Astrophysique de Paris, Sorbonne Universités, UPMC Univ Paris 06, UMR 7095, F-75014, Paris, France
14. Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
15. Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain, Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil
16. Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USA, 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. Kavli Institute for Particle Astrophysics and Cosmology, PO Box 2450, Stanford University, Stanford, CA 94305, USA
19. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA
20. Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil, Observatório Nacional, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil
21. Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
22. Department of Physics, IIT Hyderabad, Kandi, Telangana 502285, India
23. Excellence Cluster Universe, Boltzmannstr. 2, D-85748 Garching, Germany, Faculty of Physics, Ludwig-Maximilians-Universität, Scheinerstr. 1, D-81679 Munich, Germany
24. Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA, Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA
25. Institut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, Spain, Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain
26. Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA, Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
27. Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, E-28049 Madrid, Spain
28. Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK, Department of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 16, CH-8093 Zurich, Switzerland
29. Santa Cruz Institute for Particle Physics, Santa Cruz, CA 95064, USA
30. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA
31. Australian Astronomical Optics, Macquarie University, North Ryde, NSW 2113, Australia
32. Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil, Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo, CP 66318, São Paulo, SP 05314-970, Brazil
33. 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
34. Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544, USA
35. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra (Barcelona) Spain, Institució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, Spain
36. Department of Physics and Astronomy, Pevensey Building, University of Sussex, Brighton BN1 9QH, UK
37. Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA
38. School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UK
39. Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil, Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, SP 13083-859 Campinas, Brazil
40. Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
41. National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA

Weak lensing source galaxy catalogues used in estimating the masses of galaxy clusters can be heavily contaminated by cluster members, prohibiting accurate mass calibration. In this study, we test the performance of an estimator for the extent of cluster member contamination based on decomposing the photometric redshift P(z) of source galaxies into contaminating and background components. We perform a full scale mock analysis on a simulated sky survey approximately mirroring the observational properties of the Dark Energy Survey Year One observations (DES Y1), and find excellent agreement between the true number profile of contaminating cluster member galaxies in the simulation and the estimated one. We further apply the method to estimate the cluster member contamination for the DES Y1 redMaPPer cluster mass calibration analysis, and compare the results to an alternative approach based on the angular correlation of weak lensing source galaxies. We find indications that the correlation based estimates are biased by the selection of the weak lensing sources in the cluster vicinity, which does not strongly impact the P(z) decomposition method. Collectively, these benchmarks demonstrate the strength of the P(z) decomposition method in alleviating membership contamination and enabling highly accurate cluster weak lensing studies without broad exclusion of source galaxies, thereby improving the total constraining power of cluster mass calibration via weak lensing.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Michigan, Ann Arbor, MI (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
• Sponsoring Organization: USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: DES Collaboration
• Grant/Contract Number: AC02-76SF00515; SC0015975; SC0018053; AC02-05CH11231; AC02-07CH11359; SC0019193; AC05-00OR22725; AST-1138766; AST-1536171
• OSTI ID: 1560741
• Alternate ID(s): OSTI ID: 1490843; OSTI ID: 1606731; OSTI ID: 1691480
• Report Number(s): arXiv:1812.05116; FERMILAB-PUB-18-681-AE; DES-2018-0341
• Journal Information: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Vol. 489 Journal Issue: 2; ISSN 0035-8711
• Publisher: Royal Astronomical Society
• Country of Publication: United Kingdom
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
gravitational lensing: weak
galaxies: clusters: general
cosmology: observations