论文标题
holismokes。 viii。高红速度，强镜头搜索
HOLISMOKES. VIII. High-redshift, strong-lens search in the Hyper Suprime-Cam Subaru Strategic Program
论文作者
论文摘要
我们对包含高红移镜头星系的强透镜系统进行搜索，目的是将强镜辅助的星系进化研究扩展到早期的宇宙时间。两个强镜分类器由深层残留网络构建，并通过不同的镜头 - 红移和亮度分布的数据集进行培训。我们通过将两个分类器应用于其HSC $ GRI $ $ -FILTER剪切中的第二个公共数据发布中，对宽层领域的5,356,628个预选对象进行了分类。在我们的测试集中切断与$ 10^{ - 3} $的假正率相对应的阈值，两个分类器识别5,468和6,119个强镜候选者。目视检查这些候选人的切口会导致735级A级或B强镜候选者，其中首次发现了277名候选人。这是迄今为止使用HSC数据发现的一组最大的Galaxy尺度强镜候选者，其中近一半（331/735）包含透镜星系，具有高于0.6的光度红移。我们的发现将成为正在进行的和预定的光谱调查（例如黑暗能量光谱仪器，Subaru Prime Pocus Spectraggragraph项目和Maunakea Spectroscopic Explorer）的宝贵目标列表。
We carry out a search for strong-lens systems containing high-redshift lens galaxies with the goal of extending strong-lensing-assisted galaxy evolutionary studies to earlier cosmic time. Two strong-lens classifiers are constructed from a deep residual network and trained with datasets of different lens-redshift and brightness distributions. We classify a sample of 5,356,628 pre-selected objects from the Wide-layer fields in the second public data release of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) by applying the two classifiers to their HSC $gri$-filter cutouts. Cutting off at thresholds that correspond to a false positive rate of $10^{-3}$ on our test set, the two classifiers identify 5,468 and 6,119 strong-lens candidates. Visually inspecting the cutouts of those candidates results in 735 grade-A or B strong-lens candidates in total, of which 277 candidates are discovered for the first time. This is the single largest set of galaxy-scale strong-lens candidates discovered with HSC data to date, and nearly half of it (331/735) contains lens galaxies with photometric redshifts above 0.6. Our discoveries will serve as a valuable target list for ongoing and scheduled spectroscopic surveys such as the Dark Energy Spectroscopic Instrument, the Subaru Prime Focus Spectrograph project, and the Maunakea Spectroscopic Explorer.
