Galaxy Clusters from the DESI Legacy Imaging Surveys. I. Cluster Detection

被引：43
作者：
Zou, Hu [1 ]
Gao, Jinghua [1 ]
Xu, Xin [1 ,2 ]
Zhou, Xu [1 ]
Ma, Jun [1 ,2 ]
Zhou, Zhimin [1 ]
Zhang, Tianmeng [1 ]
Nie, Jundan [1 ]
Wang, Jiali [1 ]
Xue, Suijian [1 ]
机构：
[1] Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
[2] Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 101408, Peoples R China
来源：
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2021年 / 253卷 / 02期
基金：
美国国家科学基金会; 英国科学技术设施理事会; 国家重点研发计划; 美国国家航空航天局; 中国国家自然科学基金;
关键词：
Galaxy clusters; Photometry; Sky surveys; RICH CLUSTERS; OPTICAL CATALOG; EVOLUTION; II;
D O I：
10.3847/1538-4365/abe5b0
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Based on the photometric redshift catalog of Zou et al., we apply a fast clustering algorithm to identify 540,432 galaxy clusters at z less than or similar to 1 in the DESI legacy imaging surveys, which cover a sky area of about 20,000 deg(2). Monte Carlo simulations indicate that the false-detection rate of our detecting method is about 3.1%. The total masses of galaxy clusters are derived using a calibrated richness-mass relation that is based on the observations of X-ray emission and the Sunyaev and Zel'dovich effect. The median redshift and mass of our detected clusters are about 0.53 and 1.23 x 10(14) M, respectively. Comparing with previous clusters identified using the data of the Sloan Digital Sky Survey; we can recognize most of them, especially those with high richness. Our catalog will be used for further statistical studies on galaxy clusters and environmental effects on galaxy evolution, etc.
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页数：11
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