论文标题
红色活跃银河核的双峰宽发射线的双子多对象光谱仪积分单位光谱
Gemini Multi-Object Spectrograph Integral Field Unit Spectroscopy of the Double-peaked Broad Emission Line of a Red Active Galactic Nucleus
论文作者
论文摘要
预计银河系合并将在近距离分离中产生多个超级质量黑洞（SMBH），但是对这种SMBH的检测很困难。 2MASS J165939.7 $+$ 183436是一个红色的活跃银河核（AGN），由于其在哈勃太空望远镜成像和双峰宽阔的发射线（BELS）中的合并功能，因此是一种前瞻性合并SMBH候选者。本文中，我们报告了双子多对象光谱仪积分单元单位观察，对2mass j165939.7 $+$ 183436的双峰宽H $α$α$线。此外，我们确认存在两个BEL峰的存在，它们在运动学上被3000 \，$ \ rm km \，s^{ - 1} $，每个BEL组件的SMBH重量为$ 10^{8.92 \ pM0.06} \，M _ { $ 10^{7.13 \ pm0.06} \，m _ {\ rm \ odot} $，如果它们来自两个SMBHS附近的独立BEL。 BEL组件没有以$> 0 \ farcs1 $分离；但是，根据关于每个Spaxel拟合的几个合理假设，发现这两个组件以$ 0 \ farcs085 $（$ \ sim250 $ \，PC）为空间分开。拟合的不同假设可能导致null（$ <0 \ farcs05 $）或较大的空间分离（$ \ sim0 \ farcs15 $）。鉴于有关空间分离的不确定性，各种模型（例如磁盘发射极和多个SMBH模型）是解释双BEL组件的可行解决方案。这些结果将促进未来的研究，以在红色AGN中找到更多多个SMBH系统，而高分辨率成像验证了这些不同的模型。
Galaxy mergers are expected to produce multiple supermassive black holes (SMBHs) in close-separation, but the detection of such SMBHs has been difficult. 2MASS J165939.7$+$183436 is a red active galactic nucleus (AGN) that is a prospective merging SMBH candidate owing to its merging features in Hubble Space Telescope imaging and double-peaked broad emission lines (BELs). Herein, we report a Gemini Multi-Object Spectrograph Integral Field Unit observation of a double-peaked broad H$α$ line of 2MASS J165939.7$+$183436. Furthermore, we confirm the existence of two BEL peaks that are kinematically separated by 3000\,$\rm km\,s^{-1}$, with the SMBH of each BEL component weighing at $10^{8.92\pm0.06}\,M_{\rm \odot}$ and $10^{7.13\pm0.06}\,M_{\rm \odot}$, if they arise from independent BELs near the two SMBHs. The BEL components were not separated at $>0\farcs1$; however, under several plausible assumptions regarding the fitting of each spaxel, the two components are found to be spatially separated at $0\farcs085$ ($\sim250$\,pc). Different assumptions for the fitting can lead to a null ($< 0\farcs05$) or a larger spatial separation ($\sim0\farcs15$). Given the uncertainty regarding the spatial separation, various models, such as the disk emitter and multiple SMBH models, are viable solutions to explain the double BEL components. These results will promote future research for finding more multiple SMBH systems in red AGNs, and higher-resolution imaging validates these different models.
