The Massive and Distant Clusters of WISE Survey: SZ effect of Verification with the Atacama Compact Array - Localization and Cluster Analysis

被引:13
|
作者
Di Mascolo, Luca [1 ]
Mroczkowski, Tony [2 ]
Churazov, Eugene [1 ,3 ]
Moravec, Emily [4 ,5 ]
Brodwin, Mark [6 ]
Gonzalez, Anthony [5 ]
Decker, Bandon B. [6 ]
Eisenhardt, Peter R. M. [7 ]
Stanford, Spencer A. [8 ]
Stern, Daniel [7 ]
Sunyaev, Rashid [1 ,3 ]
Wylezalek, Dominika [2 ]
机构
[1] Max Planck Inst Astrophys MPA, Karl Schwarzschild Str 1, D-85741 Garching, Germany
[2] European Southern Observ ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany
[3] Space Res Inst, Profsoyuznaya 84-32, Moscow 117997, Russia
[4] Czech Acad Sci, Astron Inst, Prague Bocni 2 1401-1A, Prague 14000 4, Czech Republic
[5] Univ Florida, Dept Astron, 211 Bryant Space Sci Ctr, Gainesville, FL 32611 USA
[6] Univ Missouri, Dept Phys & Astron, 5110 Rockhill Rd, Kansas City, MO 64110 USA
[7] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
[8] Univ Calif Davis, Dept Phys, One Shields Ave, Davis, CA 95616 USA
基金
俄罗斯科学基金会;
关键词
galaxies: clusters: general; galaxies: clusters: intracluster medium; cosmic background radiation; RELATIVISTIC CORRECTIONS; GALAXY CLUSTERS; PRESSURE; SKY; CONSTRAINTS; IMPACT; MODEL;
D O I
10.1051/0004-6361/202037818
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Context. The Massive and Distant Clusters of WISE Survey (MaDCoWS) provides a catalog of high-redshift (0.7 less than or similar to z less than or similar to 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.Aims. 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.Methods. 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.Results. 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.
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页数:17
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