CFHTLenS: a weak lensing shear analysis of the 3D-Matched-Filter galaxy clusters

Jes Ford, Ludovic Van Waerbeke, Martha Milkeraitis, Clotilde Laigle, Hendrik Hildebrandt, Thomas Erben, Catherine Heymans, Henk Hoekstra, Thomas Kitching, Yannick Mellier, Lance Miller, Ami Choi, Jean Coupon, Liping Fu, Michael J. Hudson, Konrad Kuijken, Naomi Robertson, Barnaby Rowe, Tim Schrabback, Malin Velander

Research output: Contribution to journalArticlepeer-review

Abstract

We present the cluster mass-richness scaling relation calibrated by a weak lensing analysis of greater than or similar to 18 000 galaxy cluster candidates in the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS). Detected using the 3D-Matched-Filter (MF) cluster-finder of Milkeraitis et al., these cluster candidates span a wide range of masses, from the small group scale up to similar to 1015M(circle dot), and redshifts 0.2 less than or similar to z less than or similar to 0.9. The total significance of the stacked shear measurement amounts to 54 sigma. We compare cluster masses determined using weak lensing shear and magnification, finding the measurements in individual richness bins to yield 1 sigma compatibility, but with magnification estimates biased low. This first direct mass comparison yields important insights for improving the systematics handling of future lensing magnification work. In addition, we confirm analyses that suggest cluster miscentring has an important effect on the observed 3D-MF halo profiles, and we quantify this by fitting for projected cluster centroid offsets, which are typically similar to 0.4 arcmin. We bin the cluster candidates as a function of redshift, finding similar cluster masses and richness across the full range up to z similar to 0.9. We measure the 3D-MF mass-richness scaling relation M-200 = M-0(N-200/20)(beta). We find a normalization M-0 similar to (2.7(-0.4)(+0.5)) x 10(13)M(circle dot), and a logarithmic slope of beta similar to 1.4 +/- 0.1, both of which are in 1 sigma agreement with results from the magnification analysis. We find no evidence for a redshift dependence of the normalization. The CFHTLenS 3D-MF cluster catalogue is now available at cfhtlens. org.

Original languageEnglish
Pages (from-to)1304-1318
Number of pages15
JournalMonthly Notices of the Royal Astronomical Society
Volume447
Issue number2
DOIs
Publication statusPublished - 21 Feb 2015

Keywords

  • gravitational lensing: weak
  • galaxies: clusters: general
  • galaxies: photometry
  • dark matter
  • DARK-MATTER HALOES
  • DIGITAL SKY SURVEY
  • LARGE-SCALE BIAS
  • MASS-RICHNESS RELATION
  • LYMAN-BREAK GALAXIES
  • PHOTOMETRIC REDSHIFTS
  • MAXBCG CLUSTERS
  • MAGNIFICATION
  • PROFILES
  • ALGORITHM

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