Two- and three-dimensional wide-field weak lensing mass maps from the Hyper Suprime-Cam Subaru Strategic Program S16A data
Two- and three-dimensional wide-field weak lensing mass maps from the Hyper Suprime-Cam Subaru Strategic Program S16A data
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DOI：
10.1093/pasj/psx070
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发表时间：
2017-05
期刊：
影响因子：
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通讯作者：
M. Oguri;S. Miyazaki;C. Hikage;R. Mandelbaum;Y. Utsumi;H. Miyatake;M. Takada;R. Armstrong;
中科院分区：
文献类型：
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作者：
M. Oguri;S. Miyazaki;C. Hikage;R. Mandelbaum;Y. Utsumi;H. Miyatake;M. Takada;R. Armstrong;
我们提出了宽场（167 deg$^2$）弱透镜质量地图超至尊凸轮斯巴鲁战略计划（HSC-SSP）。我们比较这些弱透镜的暗物质地图与明亮的红色星系的恒星质量分布图。我们发现这两个地图之间有很强的相关性，相关系数为$\rho=0.54\pm0.03$（平滑大小为8 '$）。即使使用较小的平滑尺度$2 '$（$\rho=0.34\pm 0.01$）也可以检测到这种相关性。这种检测是唯一可能的，因为HSC-SSP弱透镜调查的高源密度（$\bar{n}\sim 25$ arcmin$^{-2}$）。我们还提出了各种测试，以证明我们的地图是不显着的系统性影响。利用源星系的光度红移信息，我们重建了一个三维质量图。这个三维质量图也被发现与三维星系质量图相关。本文提出的互相关检验表明，HSC-SSP弱透镜质量图是准备进一步的科学分析。
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.