论文标题
候选人的高红移原始群体和镜头星系在普朗克的高级源列表中与Herschel-Spire Imaging重叠
Candidate high-redshift protoclusters and lensed galaxies in the Planck list of high-z sources overlapping with Herschel-SPIRE imaging
论文作者
论文摘要
普朗克高红移源候选者（PHZ目录）列表在宇宙红外背景中包含2151个峰，这是普朗克的5个Arcmin Beam无法解决的。后续光谱观察结果表明，其中一些物体是$ z \大约2 $ prodoclusters和强力透镜，但尚未进行无偏见的调查。为此，我们已经使用了档案赫切尔·苏格（Herschel-Spire）观察来研究187个PHZ来源的统一样本。与偏向明亮，紧凑的来源有偏见的后续研究相反，我们发现我们的PHZ源中只有一个是一个明亮的重力透度的星系（峰值通量$ \ gtrsim 300 $ mjy），这表明此类物体在PHz目录中比以前相信的（$ <1 $ $ $ $ $ $ <1 $ $ <1 $ $ <1 $）。我们的大多数PHZ来源由许多红色的星系星系组成，表明典型的PHZ来源是候选杂种。但是，我们的新PHZ来源明显不如以前的研究和颜色不同，这表明红移和恒星形成率可能存在差异。尽管如此，我们的40个PHZ来源包含$>3σ$星系过重，可与早期有偏见的研究中发现的$>3σ$过重的分数相媲美。我们还采用机器学习方法来识别Herschel-Spire观察到PHZ来源的重力静态星系的极端极端（峰值通量$ \ sim 100 $ MJY），在我们无偏见的样本中总共找到了七个候选者，而在先前的偏见样品中有13个候选者。我们的新的均匀选择的目录$>3σ$候选原始群体和强力透镜为随访的高分辨率设施（例如Alma和JWST）提供了有趣的目标。
The Planck list of high-redshift source candidates (the PHz catalogue) contains 2151 peaks in the cosmic infrared background, unresolved by Planck's 5 arcmin beam. Follow-up spectroscopic observations have revealed that some of these objects are $z \approx 2$ protoclusters and strong gravitational lenses, but an unbiased survey has not yet been carried out. To this end, we have used archival Herschel-SPIRE observations to study a uniformly-selected sample of 187 PHz sources. In contrast with follow-up studies that were biased towards bright, compact sources, we find that only one of our PHz sources is a bright gravitationally-lensed galaxy (peak flux $\gtrsim 300$ mJy), indicating that such objects are rarer in the PHz catalogue than previously believed ($< 1$ per cent). The majority of our PHz sources consist of many red, star-forming galaxies, demonstrating that typical PHz sources are candidate protoclusters. However, our new PHz sources are significantly less bright than found in previous studies and differ in colour, suggesting possible differences in redshift and star-formation rate. Nonetheless, 40 of our PHz sources contain $> 3σ$ galaxy overdensities, comparable to the fraction of $> 3σ$ overdensities found in earlier biased studies. We additionally use a machine-learning approach to identify less extreme (peak flux $\sim 100$ mJy) gravitationally-lensed galaxies among Herschel-SPIRE observations of PHz sources, finding a total of seven candidates in our unbiased sample, and 13 amongst previous biased samples. Our new uniformly-selected catalogues of $> 3σ$ candidate protoclusters and strong gravitational lenses provide interesting targets for follow up with higher-resolution facilities, such as ALMA and JWST.
