The Massive and Distant Clusters of WISE Survey. IV. The Distribution of Active Galactic Nuclei in Galaxy Clusters at z ∼ 1
The Massive and Distant Clusters of WISE Survey. IV. The Distribution of Active Galactic Nuclei in Galaxy Clusters at z ∼ 1
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DOI：
10.3847/1538-4357/aaef83
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发表时间：
2018-11
期刊：
影响因子：
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通讯作者：
W. Mo;Anthony H. Gonzalez;D. Stern;M. Brodwin;B. Decker;P. Eisenhardt;E. Moravec;S. Stanford;D. Wylezalek
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文献类型：
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作者：
W. Mo;Anthony H. Gonzalez;D. Stern;M. Brodwin;B. Decker;P. Eisenhardt;E. Moravec;S. Stanford;D. Wylezalek
本文分析了大质量远星系团宽视场红外巡天探测器巡天（MaDCoWS）中2300个星系团的活动星系核（AGN）的径向分布。MaDCoWS提供了最大的星系团样本在z = 1的河外天空的覆盖。我们使用文献目录的活动星系核选择通过光学，中红外（MIR）和无线电数据，并通过光学到MIR（OIR）的颜色。对MaDCoWS星系团中心6′内活动星系核的径向分布进行叠加，发现所有选择方法的星系团中心1′内活动星系核都有明显的过密度。然而，作为团心距离的函数，拥有活动星系核的红色星系的比例取决于活动星系核的选择。在集群环境中，主机活动星系的光学签名或蓝色OIR颜色的分数是在赤字相比，该领域，而MIR-selected和红色OIR颜色的活动星系增强的集群中心相比，字段水平。射电选择活动星系核的辐射率是辐射场的2.5倍以上，表明星系团的中心有利于活动星系核的射电辐射触发。我们没有发现一个统计上显着的变化，活动星系核分数作为集群丰富度的函数。我们还研究了中心射电活动与星系团中其他活动星系核的相关性。有射电活动的星系团比没有射电活动的星系团有更多的活动星系核，这意味着中央星系团的射电活动和活动星系核的触发可能是有联系的。
We present an analysis of the radial distribution of active galactic nuclei (AGNs) in 2300 galaxy clusters from the Massive and Distant Clusters of Wide-field Infrared Survey Explorer Survey (MaDCoWS). MaDCoWS provides the largest coverage of the extragalactic sky for a cluster sample at z ∼ 1. We use literature catalogs of AGNs selected via optical, midinfrared (MIR), and radio data, and by optical-to-MIR (OIR) color. Stacking the radial distribution of AGNs within the 6′ of the centers of MaDCoWS galaxy clusters, we find a distinct overdensity of AGNs within 1′ of the galaxy cluster center for AGNs of all selection methods. The fraction of red galaxies that host AGNs as a function of clustercentric distance is, however, dependent on the AGN selection. The fraction of red galaxies in cluster environments that host AGNs selected by optical signatures or blue OIR color is at a deficit compared to the field, whereas MIR-selected and red OIR color AGNs are enhanced in the centers of clusters when compared to field levels. The radio-selected AGN fraction is more than 2.5 times that of the field, implying that the centers of clusters are conducive to the triggering of radio emission in AGNs. We do not find a statistically significant change in the AGN fraction as a function of cluster richness. We also investigate the correlation of central radio activity with other AGNs in galaxy clusters. Clusters with radio activity have more central AGNs than do radio-inactive clusters, implying that central cluster radio activity and AGN triggering may be linked.