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

*Corresponding author for this work

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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