The environments of luminous radio-WISE selected infrared galaxies

The environments of luminous radio-WISE selected infrared galaxies
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发光射电 WISE 选择的红外星系的环境

DOI:
10.1093/mnras/sty3128
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发表时间:
2019
影响因子:
4.8
通讯作者:
Penney J
Penney J
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Penney J

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我们利用宽视场红外巡天探测器(WISE)和NRAO 1.4GHz VLA巡天,在1.3GHz以上,用斯皮策太空望远镜的红外线阵相机,观测了33个被尘埃严重遮蔽的超亮高红移星系的环境。颜色的选择被用来量化任何潜在的超密度的同伴星系在这些领域。我们没有发现明显过量的星系与标准的颜色选择的IRAC颜色[3.6] − [4.5] >-0.1一致的星系在整个领域的> 1.3相对于广域Spitzer比较领域,但有一个>2σ统计过量内的中央radio-WISE星系。使用比选择> 1.3的星系的标准方法红0.5等的颜色选择,我们发现一个显着的密度过高,其中33个场中的()具有大于()水平的表面密度。在内部,这些红色星系的统计数据过剩,上升到中心峰值-平均密度的4倍。这意味着这些星系在统计上与射电智慧选择星系有关,表明与射电大声活动星系核周围的红色星系所追踪的结构相似。
We have observed the environments of a population of 33 heavily dust obscured, ultraluminous, high-redshift galaxies, selected using Wide-Field Infrared Survey Explorer (WISE) and NRAO 1.4 GHz VLA Sky Survey at> 1.3 with the infrared array camera on theSpitzer Space Telescopeoverfields. Colour selections are used to quantify any potential overdensities of companion galaxies in these fields. We find no significant excess of galaxies with the standard colour selection for IRAC colours of [3.6] − [4.5] > −0.1 consistent with galaxies at> 1.3 across the whole fields with respect to wide-areaSpitzercomparison fields, but there is a >2σ statistical excess withinof the central radio-WISE galaxy. Using a colour selection of, 0.5 magnitudes redder than the standard method of selecting galaxies at> 1.3, we find a significant overdensity, in which() of the 33 fields have a surface density greater than the() level. There is a statistical excess of these redder galaxies within, rising to a central peak–4 times the average density. This implies that these galaxies are statistically linked to the radio-WISE selected galaxy, indicating similar structures to those traced by red galaxies around radio-loud active galactic nuclei.
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