论文标题
明智调查的庞大和遥远簇:Atacama紧凑型阵列的SZ效应验证 - 本地化和群集分析
The Massive and Distant Clusters of WISE Survey: SZ effect Verification with the Atacama Compact Array -- Localization and Cluster Analysis
论文作者
论文摘要
Wise调查(MadCows)的巨大和遥远的群集提供了高红移($ 0.7 \ Lesssim Z \ Lessim 1.5 $ 1.5 $)的红外红外星系簇。然而,通过样品构件的高红移使电离内室内培养基的验证构成了崩溃和几乎病毒化的系统。这项工作的主要目的是测试Atacama紧凑型阵列(ACA;也称为Morita阵列)3频段3观测值,以约97.5 GHz为中心,以通过Thermal Sunyaev-Zeldovich(SZ)效应对群集检测进行强有力的验证。使用一个由十个Madcows星系簇组成的试验样品,ACA可以访问和中位样品丰富度的代表,我们通过贝叶斯对干涉数据的分析来推断所选星系簇的质量以及各自的检测显着性。我们对“使用ACA定位和聚类分析验证”(VACA LOCA)程序的测试表明,ACA可以在先前在全面调查中鉴定出的星系簇中稳健地确认病毒化的簇内培养基的存在。特别是,我们可以在十个VACA LOCA簇中的七个中获得SZ效应的显着检测。我们注意到,该结果与假定的压力曲线无关。然而,仅频段3中ACA的角度动态范围有限,较短的观察性整合时间以及未分辨源的可能污染限制了簇特性的详细表征以及群集质量的推理,适合于适用于质量成量缩放关系的可靠校准。
The Massive and Distant Clusters of WISE Survey (MaDCoWS) provides a catalog of high-redshift ($0.7\lesssim z\lesssim 1.5$) infrared-selected galaxy clusters. However, the verification of the ionized intracluster medium, indicative of a collapsed and nearly virialized system, is made challenging by the high redshifts of the sample members. The main goal of this work is to test the capabilities of the Atacama Compact Array (ACA; also known as the Morita Array) Band 3 observations, centered at about 97.5 GHz, to provide robust validation of cluster detections via the thermal Sunyaev-Zeldovich (SZ) effect. Using a pilot sample that comprises ten MaDCoWS galaxy clusters, accessible to ACA and representative of the median sample richness, we infer the masses of the selected galaxy clusters and respective detection significance by means of a Bayesian analysis of the interferometric data. Our test of the "Verification with the ACA - Localization and Cluster Analysis" (VACA LoCA) program demonstrates that the ACA can robustly confirm the presence of the virialized intracluster medium in galaxy clusters previously identified in full-sky surveys. In particular, we obtain a significant detection of the SZ effect for seven out of the ten VACA LoCA clusters. We note that this result is independent of the assumed pressure profile. However, the limited angular dynamic range of the ACA in Band 3 alone, short observational integration times, and possible contamination from unresolved sources limit the detailed characterization of the cluster properties and the inference of the cluster masses within scales appropriate for the robust calibration of mass-richness scaling relations.