The Massive and Distant Clusters of WISE Survey. IX. High Radio Activity in a Merging Cluster
The Massive and Distant Clusters of WISE Survey. IX. High Radio Activity in a Merging Cluster
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DOI：
10.3847/1538-4357/aba0b2
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发表时间：
2020-06
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通讯作者：
E. Moravec;Anthony H. Gonzalez;S. Dicker;S. Alberts;M. Brodwin;T. Clarke;T. Connor;B. Decker;M. Devlin;P. Eisenhardt;Brian S. Mason;W. Mo;T. Mroczkowski;Alexandra Pope;C. Romero;C. Sarazin;Jonathan Sievers;S. Stanford;D. Stern;D. Wylezalek;Fernando Zago
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作者：
E. Moravec;Anthony H. Gonzalez;S. Dicker;S. Alberts;M. Brodwin;T. Clarke;T. Connor;B. Decker;M. Devlin;P. Eisenhardt;Brian S. Mason;W. Mo;T. Mroczkowski;Alexandra Pope;C. Romero;C. Sarazin;Jonathan Sievers;S. Stanford;D. Stern;D. Wylezalek;Fernando Zago
我们对星系团Moo J1506+5137在z=1.09±0.03处的射电星系群进行了多波长研究，在以前的工作中我们发现它有多个复杂的射电源。这项工作中使用的综合数据集包括来自低频阵列两米天空调查、美国国家科学基金会的卡尔·G·扬斯基甚大阵列、罗伯特·C·伯德·格林班克望远镜、斯皮策太空望远镜和暗能量相机遗产调查的数据。我们发现有5个射电源，它们都位于星团中心500kpc(∼1‘)范围内，射电亮度为P1.4 GHz>；1.6×1024W Hz−1。典型的宿主星系是星团中恒星质量最高的星系之一。大量星系群体中的异常射电活动似乎与星系团的动力学状态有关。星系的分布表明正在进行合并，在主星系团的西北部发现了一个亚群。此外，五个源中的两个被归类为弯尾源，其中一个是潜在的广角尾部/混合形态射电源，表明环境是动态的。该星系团还位于WISE调查的大质量和遥远星系团中其他合并星系团所占据的质量丰富平面区域内。数据表明，在合并阶段，射电活动可以显著增强，这将有助于观察到红移增加的星系团中射电活动增加的趋势。
We present a multiwavelength investigation of the radio galaxy population in the galaxy cluster MOO J1506+5137 at z = 1.09 ± 0.03, which in previous work we identified as having multiple complex radio sources. The combined data set used in this work includes data from the Low-Frequency Array Two-meter Sky Survey, NSF’s Karl G. Jansky Very Large Array, the Robert C. Byrd Green Bank Telescope, the Spitzer Space Telescope, and the Dark Energy Camera Legacy Survey. We find that there are five radio sources, which are all located within 500 kpc (∼1′) of the cluster center and have radio luminosities P1.4 GHz > 1.6 × 1024 W Hz−1. The typical host galaxies are among the highest stellar mass galaxies in the cluster. The exceptional radio activity among the massive galaxy population appears to be linked to the dynamical state of the cluster. The galaxy distribution suggests an ongoing merger, with a subgroup found to the northwest of the main cluster. Furthermore, two of the five sources are classified as bent-tail sources, with one being a potential wide-angle tail/hybrid morphology radio source, indicating a dynamic environment. The cluster also lies in a region of the mass–richness plane occupied by other merging clusters in the Massive and Distant Clusters of WISE Survey. The data suggest that during the merger phase, radio activity can be dramatically enhanced, which would contribute to the observed trend of increased radio activity in clusters with increasing redshift.