论文标题
Hectomap红移调查：首次数据发布
The HectoMAP Redshift Survey: First Data Release
论文作者
论文摘要
Hectomap是一项致密的红移调查，以限制$ r = 21.3 $，在北方天空的连续1.5 $^\ Circ $带中覆盖55平方米。 Subaru/Hyper Suprime-CAM（HSC）Subaru战略计划（SSP）光度测量还涵盖了该区域，从而实现了将密集的前景红移调查与强和弱透镜图相结合的一系列应用。在整个调查区域中，Hectomap的红移中位数超过0.3，红移调查的平均密度为$ \ sim 2000 $ galaxies deg $^{ - 2} $。在这里，我们在第一个涵盖8.7平方度的数据发布中报告了总共17,313个红移。我们包括几乎所有对象的派生数量d $ _ {n} 4000 $和恒星质量。在这些星系中，8117构成一个79 \％完整的红色选择子样本，$ r \ leq 20.5 $，另外4318构成了68 \％完整的红色选择子样本，$ 20.5 <r <r <21.3 $。作为Hectomap数据优势的示例，我们讨论了两个应用：Redmapper光学选择簇的精制成员和HSC光度红移的测试。我们重点介绍了一个非凡的Redmapper强镜系统。在密集的调查中，光度计红移与光谱红移的比较发现了光度红移中的细微系统问题。
HectoMAP is a dense, red-selected redshift survey to a limiting $r = 21.3$ covering 55 square degrees in a contiguous 1.5$^\circ$ strip across the northern sky. This region is also covered by the Subaru/Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) photometric survey enabling a range of applications that combine a dense foreground redshift survey with both strong and weak lensing maps. The median redshift of HectoMAP exceeds 0.3 throughout the survey region and the mean density of the redshift survey is $\sim 2000$ galaxies deg$^{-2}$. Here we report a total of 17,313 redshifts in a first data release covering 8.7 square degrees. We include the derived quantities D$_{n}4000$ and stellar mass for nearly all of the objects. Among these galaxies, 8117 constitute a 79\% complete red-selected subsample with $r \leq 20.5$ and an additional 4318 constitute a 68\% complete red-selected subsample with $20.5 < r < 21.3$. As examples of the strengths of HectoMAP data we discuss two applications: refined membership of redMaPPer photometrically selected clusters and a test of HSC photometric redshifts. We highlight a remarkable redMaPPer strong lensing system. The comparison of photometric redshifts with spectroscopic redshifts in a dense survey uncovers subtle systematic issues in the photometric redshifts.
