The L_X-M relation of Clusters of Galaxies Metadata

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  • Main Title The L_X-M relation of Clusters of Galaxies


  • Author: Rykoff, E.S.
    Creator Type: Personal
  • Author: Evrard, A.E.
    Creator Type: Personal
  • Author: McKay, T.A.
    Creator Type: Personal
  • Author: Becker, M.R.
    Creator Type: Personal
  • Author: Johnston, D.E.
    Creator Type: Personal
  • Author: Koester, B.P.
    Creator Type: Personal
  • Author: Nord, B.
    Creator Type: Personal
  • Author: Rozo, E.
    Creator Type: Personal
  • Author: Sheldon, E.S.
    Creator Type: Personal
  • Author: Stanek, R.
    Creator Type: Personal
  • Author: Wechsler, R.H.
    Creator Type: Personal


  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization


  • Name: Stanford Linear Accelerator Center
    Place of Publication: [Menlo Park, California]
    Additional Info: SLAC


  • Creation: 2008-05-16


  • English


  • Content Description: We present a new measurement of the scaling relation between X-ray luminosity and total mass for 17,000 galaxy clusters in the maxBCG cluster sample. Stacking sub-samples within fixed ranges of optical richness, N200, we measure the mean 0.1-2.4 keV X-ray luminosity, <L{sub X}>, from the ROSAT All-Sky Survey. The mean mass, <M{sub 200}>, is measured from weak gravitational lensing of SDSS background galaxies (Johnston et al. 2007). For 9 {le} N{sub 200} < 200, the data are well fit by a power-law, <L{sub X}>/10{sup 42} h{sup -2} ergs{sup -1} = (12.6{sub -1.3}{sup +1.4}(stat) {+-} 1.6 (sys)) (<M{sub 200}>/10{sup 14} h{sup -1} M{sub {circle_dot}}){sup 1.65{+-}0.13}. The slope agrees to within 10% with previous estimates based on X-ray selected catalogs, implying that the covariance in L{sub X} and N{sub 200} at fixed halo mass is not large. The luminosity intercept is 30%, or 2{sigma}, lower than determined from the X-ray flux-limited sample of Reiprich & Boehringer (2002), assuming hydrostatic equilibrium. This slight difference could arise from a combination of Malmquist bias and/or systematic error in hydrostatic mass estimates, both of which are expected. The intercept agrees with that derived by Stanek et al. (2006) using a model for the statistical correspondence between clusters and halos in a WMAP3 cosmology with power spectrum normalization {sigma}{sub 8} = 0.85. Similar exercises applied to future data sets will allow constraints on the covariance among optical and hot gas properties of clusters at fixed mass.
  • Physical Description: 5 pages


  • Keyword: Cosmology
  • Keyword: Galaxies
  • Keyword: Hydrostatics
  • STI Subject Categories: 71 Classical And Quantum Mechanics, General Physics
  • Keyword: Astrophysics,Astro
  • Keyword: Galaxy Clusters
  • Keyword: Luminosity Astrophysics,Astro


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report


  • Text


  • Report No.: SLAC-PUB-13238
  • Grant Number: AC02-76SF00515
  • DOI: 10.2172/928354
  • Office of Scientific & Technical Information Report Number: 928354
  • Archival Resource Key: ark:/67531/metadc899887


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