THE COSMOS2015 CATALOG: EXPLORING THE 1 < z < 6 UNIVERSE WITH HALF A MILLION GALAXIES
THE COSMOS2015 CATALOG: EXPLORING THE 1 < z < 6 UNIVERSE WITH HALF A MILLION GALAXIES
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DOI：
10.3847/0067-0049/224/2/24
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发表时间：
2016-04
期刊：
影响因子：
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通讯作者：
C. Laigle;H. McCracken;O. Ilbert;B. Hsieh;I. Davidzon;P. Capak;G. Hasinger;J. Silverman;C. Pi
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文献类型：
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作者：
C. Laigle;H. McCracken;O. Ilbert;B. Hsieh;I. Davidzon;P. Capak;G. Hasinger;J. Silverman;C. Pi
我们提出了COSMOS 2015目录，其中包含精确的光度红移和恒星质量超过50万个对象在2deg 2 COSMOS领域。包括来自UltraVISTA-DR 2调查的新图像，来自斯巴鲁/Hyper-Suprime-Cam的Y波段图像，以及来自斯皮策大面积调查的Hyper-Suprime-Cam斯皮策遗留计划的红外数据，这一近红外选择目录对于早期宇宙中星系演化和环境的研究进行了高度优化。为了最大化更蓝天体和更高红移的星表完整性，在和z++图像的χ2总和上检测到了天体。该星表包含1.5 deg 2 UltraVISTA-DR 2区域的天体，并在“超深条纹”（0.62 deg 2）（3σ，3″，AB星等）中检测到天体。通过与zCOSMOS明亮光谱红移的比较，我们测量的光度红移精度= 0.007和灾难性的故障分数%。在，使用独特的数据库的光谱红移在COSMOS，我们发现= 0.021和。最深的区域达到90%的完整性限制，z = 4。颜色分布，数量计数和聚类的详细比较显示出良好的协议与文献中相同的质量范围。COSMOS 2015是一个独特的、公开的、有价值的资源，可以用来研究星系在其环境中的演化，追溯到宇宙历史的最早阶段。COSMOS 2015星表通过匿名FTP和通常的天文档案系统（CDS，ESO Phase 3，IRSA）分发。
We present the COSMOS2015 catalog, which contains precise photometric redshifts and stellar masses for more than half a million objects over the 2deg2 COSMOS field. Including new images from the UltraVISTA-DR2 survey, Y-band images from Subaru/Hyper-Suprime-Cam, and infrared data from the Spitzer Large Area Survey with the Hyper-Suprime-Cam Spitzer legacy program, this near-infrared-selected catalog is highly optimized for the study of galaxy evolution and environments in the early universe. To maximize catalog completeness for bluer objects and at higher redshifts, objects have been detected on a χ2 sum of the and z++ images. The catalog contains objects in the 1.5 deg2 UltraVISTA-DR2 region and objects are detected in the “ultra-deep stripes” (0.62 deg2) at (3σ, 3″, AB magnitude). Through a comparison with the zCOSMOS-bright spectroscopic redshifts, we measure a photometric redshift precision of = 0.007 and a catastrophic failure fraction of %. At , using the unique database of spectroscopic redshifts in COSMOS, we find = 0.021 and . The deepest regions reach a 90% completeness limit of to z = 4. Detailed comparisons of the color distributions, number counts, and clustering show excellent agreement with the literature in the same mass ranges. COSMOS2015 represents a unique, publicly available, valuable resource with which to investigate the evolution of galaxies within their environment back to the earliest stages of the history of the universe. The COSMOS2015 catalog is distributed via anonymous ftp and through the usual astronomical archive systems (CDS, ESO Phase 3, IRSA).