articleMonthly Notices of the Royal Astronomical SocietyOct 31, 2016BRONZE OA

KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing

HHH. HildebrandtMVMassimo ViolaCHCatherine HeymansSJShahab JoudakiKKKonrad Kuijken

University of Bonn · Leiden University · +10 more institutions

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Abstract

We present cosmological parameter constraints from a tomographic weak gravitational lensing analysis of ∼450 deg2 of imaging data from the Kilo Degree Survey (KiDS). For a flat ΛCDM cosmology with a prior on H0 that encompasses the most recent direct measurements, we find
\nS8≡σ8Ωm/0.3−−−−−−√=0.745±0.039
\nS8≡σ8Ωm/0.3=0.745±0.039. 
\n
\nThis result is in good agreement with other low redshift probes of large scale structure, including recent cosmic shear results, along with pre-Planck cosmic microwave background constraints. A 2.3-σ tension in S8 and ‘substantial discordance’ in the full parameter space is found with respect to the Planck 2015 results. We use shear measurements for nearly 15…

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Keywords
  • Physics
  • Gravitational lens
  • Weak gravitational lensing
  • Gravitational lensing formalism
  • Strong gravitational lensing
  • Astrophysics
  • Gravitation
  • Astronomy
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