南方宇宙学巡天I：南方共同区毫米波实验的光学星团探测和预报
Southern Cosmology Survey I: Optical Cluster Detections and Predictions for the Southern Common-Area Millimeter-Wave Experiments
摘要：
我们目前的第一个结果，从南方宇宙学调查，一个新的多波长调查的南部天空协调与阿塔卡玛宇宙望远镜（ACT），最近委托地面毫米波段宇宙微波背景实验。本文提出了一个全面的分析档案光学多波段成像数据，涵盖了8平方度区域附近的赤经23小时和赤经-55度，获得的布兰科4米望远镜和马赛克-II相机在2005年底。我们描述了我们已经开发的管道来处理这个大数据量，获得准确的光度红移，并检测光学集群。我们的聚类发现过程使用匹配的空间滤波器，光度红移概率分布和丰富度估计的组合。我们目前的光度红移，丰富的估计，光度和质量为8个新的光学选择的质量大于$3\times10^{14}M_{\sun}$在红移0.7的集群。我们还提出了预期的Sunyaev-Zel'dovich效应（SZE）信号从这些集群的具体预测即将到来的观测ACT，南极望远镜和阿塔卡马探路者实验的估计。
英文摘要：
We present first results from the Southern Cosmology Survey, a new multiwavelength survey of the southern sky coordinated with the Atacama Cosmology Telescope (ACT), a recently commissioned ground-based mm-band Cosmic Microwave Background experiment. This article presents a full analysis of archival optical multi-band imaging data covering an 8 square degree region near right ascension 23 hours and declination -55 degrees, obtained by the Blanco 4-m telescope and Mosaic-II camera in late 2005. We describe the pipeline we have developed to process this large data volume, obtain accurate photometric redshifts, and detect optical clusters. Our cluster finding process uses the combination of a matched spatial filter, photometric redshift probability distributions and richness estimation. We present photometric redshifts, richness estimates, luminosities, and masses for 8 new optically-selected clusters with mass greater than $3\times10^{14}M_{\sun}$ at redshifts out to 0.7. We also present estimates for the expected Sunyaev-Zel'dovich effect (SZE) signal from these clusters as specific predictions for upcoming observations by ACT, the South Pole Telescope and Atacama Pathfinder Experiment.
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