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Title: Mass and galaxy distributions of four massive galaxy clusters from Dark Energy Survey Science Verification data

We measure the weak-lensing masses and galaxy distributions of four massive galaxy clusters observed during the Science Verification phase of the Dark Energy Survey. This pathfinder study is meant to 1) validate the DECam imager for the task of measuring weak-lensing shapes, and 2) utilize DECam's large field of view to map out the clusters and their environments over 90 arcmin. We conduct a series of rigorous tests on astrometry, photometry, image quality, PSF modelling, and shear measurement accuracy to single out flaws in the data and also to identify the optimal data processing steps and parameters. We find Science Verification data from DECam to be suitable for the lensing analysis described in this paper. The PSF is generally well-behaved, but the modelling is rendered difficult by a flux-dependent PSF width and ellipticity. We employ photometric redshifts to distinguish between foreground and background galaxies, and a red-sequence cluster finder to provide cluster richness estimates and cluster-galaxy distributions. By fitting NFW profiles to the clusters in this study, we determine weak-lensing masses that are in agreement with previous work. For Abell 3261, we provide the first estimates of redshift, weak-lensing mass, and richness. Additionally, the cluster-galaxy distributions indicate the presence ofmore » filamentary structures attached to 1E 0657-56 and RXC J2248.7-4431, stretching out as far as 1degree (approximately 20 Mpc), showcasing the potential of DECam and DES for detailed studies of degree-scale features on the sky.« less
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [6] ;  [3] ;  [6] ;  [1] ;  [6] ;  [2] ;  [6] ;  [9] ;  [3] ;  [1] more »;  [10] ;  [2] ;  [6] ;  [7] ;  [5] ;  [3] ;  [11] ;  [2] ;  [12] ;  [2] ;  [13] ;  [14] ;  [15] ;  [9] ;  [16] ;  [17] ;  [18] ;  [19] ;  [20] ;  [21] ;  [9] ;  [2] ;  [9] ;  [22] ;  [23] ;  [24] ;  [9] ;  [9] ;  [25] ;  [17] ;  [26] ;  [27] ;  [9] ;  [6] ;  [28] ;  [9] ;  [29] ;  [9] ;  [2] ;  [18] ;  [30] ;  [9] ;  [20] ;  [9] ;  [26] ;  [31] ;  [32] ;  [9] ;  [7] ;  [9] ;  [16] ;  [33] ;  [16] ;  [6] ;  [34] ;  [35] ;  [16] ;  [26] ;  [34] ;  [10] ;  [11] ;  [9] ;  [36] ;  [26] ;  [26] ;  [28] ;  [37] ;  [9] ;  [11] ;  [16] ;  [38] ;  [9] « less
  1. The Ohio State Univ., Columbus, OH (United States)
  2. Univ. College London, London (United Kingdom)
  3. Univ. of Manchester, Manchester (United Kingdom)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Univ. Observatory Munich, Munich (Germany)
  6. Univ. of Pennsylvania, Philadelphia, PA (United States)
  7. Univ. of Portsmouth, Portsmouth (United Kingdom)
  8. Univ. of Chicago, Chicago, IL (United States)
  9. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  10. Brookhaven National Lab. (BNL), Upton, NY (United States)
  11. Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, La Serena (Chile)
  12. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Space Telescope Science Institute, Baltimore, MD (United States)
  13. Argonne National Lab. (ANL), Argonne, IL (United States)
  14. Carnegie Observatories, Pasadena, CA (United States)
  15. Univ. Pierre et Marie Curie, Paris (France)
  16. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
  17. Institut de Ciencies de l'Espai, Barcelona (Spain)
  18. Observatorio Nacional, Rio de Janeiro (Brazil); Lab. Interinstitucional de e-Astronomia, Rio de Janeiro (Brazil)
  19. Stanford Univ., Stanford, CA (United States)
  20. Texas A & M Univ., College Station, TX (United States)
  21. Ludwig Maximilian Univ., Munich (Germany); Excellence Cluster Universe, Garching (Germany)
  22. Univ. Pierre et Marie Curie, Paris (France); Univ. of Michigan, Ann Arbor, MI (United States)
  23. Lab. Interinstitucional de e-Astronomia, Rio de Janeiro (Brazil)
  24. Univ. Autonoma de Barcelona, Barcelona (Spain)
  25. Univ. of Chicago, Chicago, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  26. Univ. of Michigan, Ann Arbor, MI (United States)
  27. Univ. of Illinois, Urbana, IL (United States); National Center for Supercomputing Applications, Urbana, IL (United States)
  28. Univ. of Illinois, Urbana, IL (United States)
  29. Australian Astronomical Observatory (Australia)
  30. Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro (Brazil)
  31. Univ. Autonoma de Barcelona, Barcelona (Spain); Institucio Catalana de Recerca i Estudis Avancats, Barcelona (Spain)
  32. Ludwig Maximilian Univ., Munich (Germany)
  33. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  34. Centro de Investigaciones Energeticas, Madrid (Spain)
  35. Lab. Interinstitucional de e-Astronomia, Rio de Janeiro (Brazil); Instituto de Fisica, Port Alegre (Brazil)
  36. National Center for Supercomputing Applications, Urbana, IL (United States)
  37. Univ. of Portsmouth, Portsmouth (United Kingdom); South East Physics Network (United Kingdom)
  38. Univ. Observatory Munich, Munich (Germany); Max Planck Institute for Extraterrestrial Physics; Garching (Germany); Excellence Cluster Universe, Garching (Germany)
Publication Date:
OSTI Identifier:
1201361
Report Number(s):
BNL--108181-2015-JA
Journal ID: ISSN 0035-8711; KA2301020
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 449; Journal Issue: 3; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS cosmology: observations; gravitational lensing: weak; galaxies: clusters: individual: RXC J2248.7-4331; galaxies: clusters: individual: 1E 0657-56: galaxies clusters: individual: SCSO J23327-535827; galaxies clusters: individual: Abell 3261