具有亚弧秒分离的新的多AGN系统：通过新的GMP方法选择的候选系统的确认
New multiple AGN systems with sub-arcsec separation: confirmation of candidates selected via the novel GMP method
摘要：
在天空中小投影距离处存在多个活动星系核（AGN），要么是由于存在多个螺旋形SMBH，要么是由于单个AGN的引力透镜。这两种现象使我们能够解决重要的天体物理学和宇宙学问题。然而，很少kpc分离的多重活动星系核目前已知。最近，新开发的盖亚多峰（GMP）方法提供了许多新的候选成员，这些人口。我们提出了空间分辨，积分场光谱学的一个样本的四个GMP选择的多AGN候选人。在所有这些系统中，我们检测到两个或多个组件与sub-arcsec分离。我们发现其中两个系统是对偶活动星系核，一个是内禀三元组活动星系核或透镜对偶活动星系核，而另一个系统是活动星系核/恒星偶联。我们的观测结果使z> 0.5时在投影距离小于7 kpc时确认的多重活动星系核的数量增加了一倍，首次在z> 0.5时在单个星系中检测到可能的三重活动星系核，并成功地测试了GMP方法作为发现先前未知的多重活动星系核的新技术。
英文摘要：
The existence of multiple active galactic nuclei (AGN) at small projected distances on the sky is due to either the presence of multiple, in-spiraling SMBHs, or to gravitational lensing of a single AGN. Both phenomena allow us to address important astrophysical and cosmological questions. However, few kpc-separation multiple AGN are currently known. Recently, the newly-developed Gaia Multi peak (GMP) method provided numerous new candidate members of these populations. We present spatially resolved, integral-field spectroscopy of a sample of four GMP-selected multiple AGNs candidates. In all of these systems, we detect two or more components with sub-arcsec separations. We find that two of the systems are dual AGNs, one is either an intrinsic triple or a lensed dual AGN, while the last system is a chance AGN/star alignment. Our observations double the number of confirmed multiple AGNs at projected separations below 7 kpc at z > 0.5, present the first detection of a possible triple AGN in a single galaxy at z > 0.5, and successfully test the GMP method as a novel technique to discover previously unknown multiple AGNs.
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