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arXiv · 1705.06792

Two- and three-dimensional wide-field weak lensing mass maps from the Hyper Suprime-Cam Subaru Strategic Program S16A data

Masamune Oguri·Satoshi Miyazaki·Chiaki Hikage·Rachel Mandelbaum·Yousuke Utsumi·Hironao Miyatake·Masahiro Takada·Robert Armstrong·James Bosch·Yutaka Komiyama·Alexie Leauthaud·Surhud More·Atsushi J. Nishizawa·Nobuhiro Okabe·Masayuki Tanaka
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Abstract

We present wide-field (167 deg$^2$) weak lensing mass maps from the Hyper Supreme-Cam Subaru Strategic Program (HSC-SSP). We compare these weak lensing based dark matter maps with maps of the distribution of the stellar mass associated with luminous red galaxies. We find a strong correlation between these two maps with a correlation coefficient of $ρ=0.54\pm0.03$ (for a smoothing size of $8'$). This correlation is detected even with a smaller smoothing scale of $2'$ ($ρ=0.34\pm 0.01$). This detection is made uniquely possible because of the high source density of the HSC-SSP weak lensing survey ($\bar{n}\sim 25$ arcmin$^{-2}$). We also present a variety of tests to demonstrate that our maps are not significantly affected by systematic effects. By using the photometric redshift information associated with source galaxies, we reconstruct a three-dimensional mass map. This three-dimensional mass map is also found to correlate with the three-dimensional galaxy mass map. Cross-correlation tests presented in this paper demonstrate that the HSC-SSP weak lensing mass maps are ready for further science analyses.

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Masamune Oguri, Satoshi Miyazaki, Chiaki Hikage, Rachel Mandelbaum, Yousuke Utsumi, Hironao Miyatake, Masahiro Takada, Robert Armstrong, James Bosch, Yutaka Komiyama, Alexie Leauthaud, Surhud More, Atsushi J. Nishizawa, Nobuhiro Okabe, Masayuki Tanaka. 2017-06-30. Two- and three-dimensional wide-field weak lensing mass maps from the Hyper Suprime-Cam Subaru Strategic Program S16A data. https://doi.org/10.1093/pasj%2Fpsx070

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