Two- and three-dimensional wide-field weak lensing mass maps from the Hyper Suprime-Cam Subaru Strategic Program S16A data. (29th August 2017)

• Record Type: Journal Article
• Authors: Oguri, Masamune; Miyazaki, Satoshi; Hikage, Chiaki; Mandelbaum, Rachel; Utsumi, Yousuke; Miyatake, Hironao; Takada, Masahiro; Armstrong, Robert; Bosch, James; Komiyama, Yutaka; Leauthaud, Alexie; More, Surhud; Nishizawa, Atsushi J; Okabe, Nobuhiro; Tanaka, Masayuki
• Is Part Of: Publications of the Astronomical Society of Japan. Volume 70:Number SP1(2018)
• Publication Date: 2017-08-29
• Subjects: dark matter -- gravitational lensing: weak -- large-scale structure of universe; Astronomy -- Periodicals; 520.5
• DOI: 10.1093/pasj/psx070
• Languages: English
• ISSNs: 0004-6264

Abstract

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 ± 0.03 (for a smoothing size of 8΄). This correlation is detected even with a smaller smoothing scale of 2΄ (ρ = 0.34 ± 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.