CFHTLenS: higher order galaxy-mass correlations probed by galaxy-galaxy-galaxy lensing

P. Simon, T. Erben, P. Schneider, C. Heymans, H. Hildebrandt, H. Hoekstra, T. D. Kitching, Y. Mellier, L. Miller, L. Van Waerbeke, C. Bonnett, J. Coupon, L. Fu, M. J. Hudson, K. Kuijken, B. T. P. Rowe, T. Schrabback, E. Semboloni, M. Velander

Research output: Contribution to journalArticlepeer-review

Abstract

We present the first direct measurement of the galaxy-matter bispectrum as a function of galaxy luminosity, stellar mass and type of spectral energy distribution (SED). Our analysis uses a galaxy-galaxy-galaxy lensing technique (G3L), on angular scales between 9 arcsec and 50 arcmin, to quantify (i) the excess surface mass density around galaxy pairs (excess mass hereafter) and (ii) the excess shear-shear correlations around single galaxies, both of which yield a measure of two types of galaxy-matter bispectra. We apply our method to the state-of-the-art Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS), spanning 154 square degrees. This survey allows us to detect a significant change of the bispectra with lens properties. Measurements for lens populations with distinct redshift distributions become comparable by a newly devised normalization technique. That will also aid future comparisons to other surveys or simulations. A significant dependence of the normalized G3L statistics on luminosity within -23

Original languageEnglish
Pages (from-to)2476-2498
Number of pages23
JournalMonthly Notices of the Royal Astronomical Society
Volume430
Issue number3
DOIs
Publication statusPublished - Apr 2013

Keywords

  • gravitational lensing: weak
  • galaxies: haloes
  • darkmatter
  • large-scale structure of Universe
  • DARK-MATTER HALOS
  • 3-POINT CORRELATION-FUNCTION
  • DIGITAL SKY SURVEY
  • BONN DEEP SURVEY
  • COSMIC SHEAR
  • STATISTICAL-ANALYSIS
  • SHAPE MEASUREMENT
  • STELLAR MASS
  • WEAK
  • BIAS

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