Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data

Abstract We measure cosmic weak lensing shear power spectra with the Subaru Hyper Suprime-Cam (HSC) survey first-year shear catalog covering 137 deg2 of the sky. Thanks to the high effective galaxy number density of ∼17 arcmin−2, even after conservative cuts such as a magnitude cut of i < 24.5 and photometric redshift cut of 0.3 ≤ z ≤ 1.5, we obtain a high-significance measurement of the cosmic shear power spectra in four tomographic redshift bins, achieving a total signal-to-noise ratio of 16 in the multipole range 300 ≤ ℓ ≤ 1900. We carefully account for various uncertainties in our analysis including the intrinsic alignment of galaxies, scatters and biases in photometric redshifts, residual…

• NA
  National Aeronautics and Space Administration

  Award: NNX08AR22G
• MO
  Ministry of Education, Culture, Sports, Science and Technology
• NN
  National Natural Science Foundation of China

  Award: AST-1238877
• NA
  National Astronomical Observatory of Japan
• JS
  Japan Society for the Promotion of Science

  Awards: JP18H04350, JP15H03654, JP16K17684, JP17H06599, JP18H04348, JP16H01089, JP18K03693
• JS
  Japan Science and Technology Agency
• CR
  Core Research for Evolutional Science and Technology

  Award: JPMJCR1414