来自普朗克早期SZ样本的两个未经证实的星系团候选者的Bolocam观测
Bolocam Observations of Two Unconfirmed Galaxy Cluster Candidates from the Planck Early SZ Sample
摘要：
我们提出了两个星系团候选人的Bolocam观测报告为未经证实的普朗克早期Sunyaev-Zel 'dovich（eSZ）样本，PLCKESZ G115.71 + 17.52和PLCKESZ G189.84 - 37.24。2011年10月，我们在加州理工学院Submm天文台的140 GHz处用Bolocam观察了这些候选人。由此产生的图像在其中心区域具有约30 μ KCMB-arcmin的白噪声水平。我们发现一个显着的SZ递减PLCKESZ G115.71。该递减具有5.3 \times 10 - 5的误检测概率，因此我们确认PLCKESZ G115.71为聚类。朝向PLCKESZ G189.84的最大SZ递减对应于0.027的错误检测概率，并且因此其保持为未确认的聚类候选。为了使我们的SZ衍生的结果更加强大，我们还分析了来自宽视场红外巡天探测器（WISE）在每个集群候选者位置的数据。我们发现一个超密度的WISE源在PLCKESZ G115.71的位置与eSZ中的其他集群一致，提供了进一步的证据，它是一个集群。我们在PLCKESZ G189.84的位置没有发现WISE源的显著过密度。
英文摘要：
We present Bolocam observations of two galaxy cluster candidates reported as unconfirmed in the Planck early Sunyaev-Zel'dovich (eSZ) sample, PLCKESZ G115.71+17.52 and PLCKESZ G189.84-37.24. We observed each of these candidates with Bolocam at 140 GHz from the Caltech Submm Observatory in October 2011. The resulting images have white noise levels of ~30 μKCMB-arcmin in their central regions. We find a significant SZ decrement towards PLCKESZ G115.71. This decrement has a false detection probability of 5.3\times10-5, and we therefore confirm PLCKESZ G115.71 as a cluster. The maximum SZ decrement towards PLCKESZ G189.84 corresponds to a false detection probability of 0.027, and it therefore remains as an unconfirmed cluster candidate. In order to make our SZ-derived results more robust, we have also analyzed data from the Wide-field Infrared Survey Explorer (WISE) at the location of each cluster candidate. We find an overdensity of WISE sources consistent with other clusters in the eSZ at the location of PLCKESZ G115.71, providing further evidence that it is a cluster. We do not find a significant overdensity of WISE sources at the location of PLCKESZ G189.84.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
