与WISE超密度相关的z>0.5的大质量普朗克发现的星团候选者的CARMA观测：策略、观测和验证
CARMA observations of massive Planck-discovered cluster candidates at z>0.5 associated with WISE overdensities: strategy, observations and validation
摘要：
我们对19个未经证实的普朗克星系团候选者进行了1-2弧分空间分辨率的CARMA-8 31-GHz观测，这些候选者从WISE早期数据发布中被选为具有显著的星系超密度，并被认为是在假定的最亮星系团（BCG）的WISE颜色z>1处。我们发现一个Sunyaev-Zeldovich（SZ）检测的CARMA-8数据对9个候选集群，其中一个检测被认为是试探性的。对于每个集群候选人，我们提出的CARMA-8地图，他们的放射源环境的研究，我们评估的SZ检测的可靠性。CARMA SZ的探测似乎是SZ-亮的，衰减的平均主束校正峰值通量密度为-2.9mJy/束，标准偏差为0.8，通常偏离普朗克位置约80弧秒。使用CARMA SZ质心附近的存档成像数据，我们提出了一个星团与Abell 586匹配的证据-一个已知的z~0.2星团;四个候选星团可能具有0.3<z<0.7;对于其余4个，红移信息是不确定的。我们还认为，普朗克和WISE之间的互相关所产生的灵敏度限制使得使用我们的选择标准来识别z > 1的集群具有挑战性。
英文摘要：
We present 1-2 arcmin spatial resolution CARMA-8 31-GHz observations towards 19 unconfirmed Planck cluster candidates, selected to have significant galaxy overdensities from the WISE early data release and thought to be at z>1 from the WISE colors of the putative brightest cluster galaxy (BCG). We find a Sunyaev-Zeldovich (SZ) detection in the CARMA-8 data towards 9 candidate clusters, where one detection is considered tentative. For each cluster candidate we present CARMA-8 maps, a study of their radio-source environment and we assess the reliability of the SZ detection. The CARMA SZ detections appear to be SZ-bright, with the mean, primary-beam-corrected peak flux density of the decrement being -2.9mJy/beam with a standard deviation of 0.8, and are typically offset from the Planck position by approximately 80 arcsec. Using archival imaging data in the vicinity of the CARMA SZ centroids, we present evidence that one cluster matches Abell 586-a known z~0.2 cluster; four candidate clusters are likely to have 0.3<z<0.7; and, for the remaining 4, the redshift information is inconclusive. We also argue that the sensitivity limits resulting from the cross-correlation between Planck and WISE makes it challenging to use our selection criterion to identify clusters at z > 1.
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