articleMonthly Notices of the Royal Astronomical SocietyMay 9, 2013BRONZE OA

CFHTLenS tomographic weak lensing cosmological parameter constraints: Mitigating the impact of intrinsic galaxy alignments

CHCatherine HeymansEGEmma GrocuttAHAlan HeavensMKM. KilbingerTKThomas Kitching

Royal Observatory · Scottish Universities Physics Alliance · +25 more institutions

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Abstract

We present a finely binned tomographic weak lensing analysis of the Canada–France–Hawaii Telescope Lensing Survey (CFHTLenS) mitigating contamination to the signal from the presence of intrinsic galaxy alignments via the simultaneous fit of a cosmological model and an intrinsic alignment model. CFHTLenS spans 154 square degrees in five optical bands, with accurate shear and photometric redshifts for a galaxy sample with a median redshift of z_m = 0.70. We estimate the 21 sets of cosmic shear correlation functions associated with six redshift bins, each spanning the angular range of 1.5 < θ < 35 arcmin. We combine this CFHTLenS data with auxiliary cosmological probes: the cosmic microwave background with…

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Topics & keywords

Topics
Keywords
  • Physics
  • Astrophysics
  • Cosmic microwave background
  • Weak gravitational lensing
  • Galaxy
  • Cosmology
  • Redshift
  • Spectral density
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