4.7 Article

Mass function of rich galaxy clusters and its constraint on Σ8

期刊

出版社

WILEY-BLACKWELL
DOI: 10.1111/j.1365-2966.2010.16930.x

关键词

galaxies: clusters: general; cosmological parameters

资金

  1. National Natural Science Foundation (NNSF) of China [10773016, 10821061, 1083303]
  2. National Key Basic Research Science Foundation of China [2007CB815403]
  3. Liaoning Educational Foundation of China [2009A646, XN200902, 054-55440105020]
  4. Alfred P. Sloan Foundation
  5. American Museum of Natural History
  6. Astrophysical Institute Potsdam
  7. University of Basel
  8. Cambridge University
  9. Case Western Reserve University
  10. University of Chicago
  11. Drexel University
  12. Fermilab
  13. Institute for Advanced Study
  14. Japan Participation Group
  15. Johns Hopkins University
  16. Joint Institute for Nuclear Astrophysics
  17. Kavli Institute for Particle Astrophysics and Cosmology
  18. Korean Scientist Group
  19. Chinese Academy of Sciences (LAMOST)
  20. Los Alamos National Laboratory
  21. Max Planck Institute for Astronomy (MPIA)
  22. Max Planck Institute for Astrophysics (MPA)
  23. New Mexico State University
  24. Ohio State University
  25. University of Pittsburgh
  26. University of Portsmouth
  27. Princeton University
  28. United States Naval Observatory
  29. University of Washington
  30. National Science Foundation
  31. U.S. Department of Energy
  32. National Aeronautics and Space Administration
  33. Japanese Monbukagakusho
  34. Max Planck Society
  35. Higher Education Funding Council for England

向作者/读者索取更多资源

The mass function of galaxy clusters is a powerful tool to constrain cosmological parameters, e.g. the mass fluctuation on the scale of 8 h-1 Mpc, Sigma(8), and the abundance of total matter, (m). We first determine the scaling relations between cluster mass and cluster richness, summed r-band luminosity and the global galaxy number within a cluster radius. These relations are then used to two complete volume-limited rich cluster samples which we obtained from the Sloan Digital Sky Survey (SDSS). We estimate the masses of these clusters and determine the cluster mass function. Fitting the data with a theoretical expression, we get the cosmological parameter constraints in the form of Sigma(8)((m)/0.3)alpha = beta and find out the parameters of alpha = 0.40-0.50 and beta = 0.8-0.9, so that Sigma(8) = 0.8-0.9 if (m) = 0.3. Our Sigma(8) value is slightly higher than recent estimates from the mass function of X-ray clusters and the Wilkinson Microwave Anisotropy Probe (WMAP) data, but consistent with the weak lensing statistics.

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