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Title: Comparing Dark Energy Survey and HST–CLASH observations of the galaxy cluster RXC J2248.7–4431: Implications for stellar mass versus dark matter

We derive the stellar mass fraction in the galaxy cluster RXC J2248.7–4431 observed with the Dark Energy Survey (DES) during the Science Verification period. We compare the stellar mass results from DES (five filters) with those from the Hubble Space Telescope Cluster Lensing And Supernova Survey (CLASH; 17 filters). When the cluster spectroscopic redshift is assumed, we show that stellar masses from DES can be estimated within 25 per cent of CLASH values. We compute the stellar mass contribution coming from red and blue galaxies, and study the relation between stellar mass and the underlying dark matter using weak lensing studies with DES and CLASH. An analysis of the radial profiles of the DES total and stellar mass yields a stellar-to-total fraction of f* = (6.8 ± 1.7) × 10–3 within a radius of r200c ≃ 2 Mpc. Our analysis also includes a comparison of photometric redshifts and star/galaxy separation efficiency for both data sets. We conclude that space-based small field imaging can be used to calibrate the galaxy properties in DES for the much wider field of view. Finally, the technique developed to derive the stellar mass fraction in galaxy clusters can be applied to the ~100 000 clustersmore » that will be observed within this survey and yield important information about galaxy evolution.« less
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [4] ;  [5] ;  [6] ;  [6] ;  [1] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11] ;  [12] ;  [13] ;  [14] ;  [15] ;  [6] more »;  [16] ;  [17] ;  [1] ;  [6] ;  [10] ;  [18] ;  [19] ;  [20] ;  [21] ;  [22] ;  [23] ;  [24] ;  [19] ;  [25] ;  [25] ;  [1] ;  [6] ;  [13] ;  [6] ;  [26] ;  [13] ;  [27] ;  [20] ;  [6] ;  [28] ;  [14] ;  [29] ;  [6] ;  [30] ;  [31] ;  [19] ;  [30] ;  [13] ;  [32] ;  [6] ;  [19] ;  [33] ;  [10] ;  [34] ;  [6] ;  [35] ;  [14] ;  [6] ;  [36] ;  [37] ;  [13] ;  [38] ;  [6] ;  [39] « less
  1. Univ. College London, London (United Kingdom)
  2. Univ. of Cambridge, Cambridge (United Kingdom)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States); Univ. Observatory Munich, Munich (Germany); Max Planck Institute for Extraterrestrial Physics, Garching (Germany)
  4. Princeton Univ., Princeton, NJ (United States)
  5. The Barcelona Institute of Science and Technology, Bellaterra (Barcelona) (Spain)
  6. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  7. Univ. of California, Santa Cruz, CA (United States)
  8. Univ. of Sussex, Brighton (United Kingdom)
  9. Univ. of Arizona, Tucson, AZ (United States)
  10. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
  11. Univ. Observatory Munich, Munich (Germany); Max Planck Institute for Extraterrestrial Physics, Garching (Germany)
  12. Univ. of Pennsylvania, Philadelphia, PA (United States)
  13. Univ. of Michigan, Ann Arbor, MI (United States)
  14. National Optical Astronomy Observatory, La Serena (Chile)
  15. Univ. College London, London (United Kingdom); Rhodes Univ., Grahamstown (South Africa)
  16. Univ. College London, London (United Kingdom); Institut d'Astrophysique de Paris, Paris (France); Sorbonne Univ., Paris (France)
  17. Institut d'Astrophysique de Paris, Paris (France); Sorbonne Univ., Paris (France)
  18. Univ. of Portsmouth, Portsmouth (United Kingdom)
  19. Lab. Interinstitucional de e-Astronomia - LIneA, Rio de Janeiro (Brazil); Observatorio Nacional, Rio de Janeiro (Brazil)
  20. Univ. of Illinois, Urbana, IL (United States); National Center for Supercomputing Applications, Urbana, IL (United States)
  21. The Barcelona Institute of Science and Technology, Bellaterra (Barcelona) (Spain); Institut de Ciencies de l'Espai, Barcelona (Spain)
  22. Institut de Ciencies de l'Espai, Barcelona (Spain)
  23. Stanford Univ., Stanford, CA (United States)
  24. Univ. of Portsmouth, Portsmouth (United Kingdom); Univ. of Southampton, Southampton (United Kingdom)
  25. Excellence Cluster Universe, Garching (Germany); Ludwig-Maximilians Univ., Munich (Germany)
  26. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, Chicago, IL (United States)
  27. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  28. The Ohio State Univ., Columbus, OH (United States)
  29. Australian Astronomical Observatory, North Ryde, NSW (Australia)
  30. Texas A & M Univ., College Station, TX (United States)
  31. Lab. Interinstitucional de e-Astronomia - LIneA, Rio de Janeiro (Brazil); Univ. de Sao Paulo, Sao Paulo (Brazil)
  32. The Barcelona Institute of Science and Technology, Bellaterra (Barcelona) (Spain); Institucio Catalana de Recerca i Estudis Avancats, Barcelona (Spain)
  33. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  34. Centro de Investigaciones Energeticas Medioambientales y Tecnologicas (CIEMAT), Madrid (Spain)
  35. Univ. of Illinois, Urbana, IL (United States); Centro de Investigaciones Energeticas, Madrid (Spain)
  36. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lab. Interinstitucional de e-Astronomia - LIneA, Rio de Janeiro (Brazil)
  37. National Center for Supercomputing Applications, Urbana, IL (United States)
  38. Univ. of Portsmouth,Portsmouth (United Kingdom)
  39. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
OSTI Identifier:
1349269
Grant/Contract Number:
FP7/291329; PF5-160138; SC0013541; AST-1138766; AYA2012-39559, ESP2013-48274, FPA2013-47986; FP7/2007-2013; 240672, 291329, and 306478; AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 463; Journal Issue: 2; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Research Org:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Contributing Orgs:
DES Collaboration
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS surveys; galaxies: clusters: general; galaxies: evolution; galaxies: photometry