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

## TL;DR

This paper presents high-resolution, wide-field weak lensing mass maps from the HSC-SSP survey, demonstrating their strong correlation with galaxy distributions and reconstructing three-dimensional mass maps with minimal systematic effects.

## Contribution

The study provides the first large-scale, high-resolution weak lensing mass maps from HSC-SSP, including three-dimensional reconstructions, with thorough validation against systematic biases.

## Key findings

- Strong correlation between lensing mass maps and galaxy distributions.
- Successful reconstruction of 3D mass maps using photometric redshifts.
- Maps are robust against systematic effects.

## 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 $\rho=0.54\pm0.03$ (for a smoothing size of $8'$). This correlation is detected even with a smaller smoothing scale of $2'$ ($\rho=0.34\pm 0.01$). 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.