OUP accepted manuscript
OUP accepted manuscript
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DOI：
10.1093/mnrasl/slac026
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发表时间：
2022
影响因子：
--
通讯作者：
中科院分区：
文献类型：
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大多数大质量星系的中心都有一个超大质量黑洞（SMBH）。当星系合并时，它们的SMBH下沉到新星系的中心，在那里它们被认为最终会合并。在这个过程中，形成了SMBH二进制。在活动星系核（AGN）的光谱中存在两组宽发射线，这被解释为两个宽线区（BLR）的证据，其中一个围绕着双星中的每个SMBH。我们用一个宽的和几个窄的高斯分量模拟了373个极端变率活动星系核的SDSS谱中的宽的巴耳末发射线。我们报告了SDSS J021647.53 − 011341.5（以下简称J0216）作为双峰宽发射线源的发现。在373个活动星系核中，有5个源被称为双峰发射线源。其中三个已被报道为候选SMBH二进制在以前的研究。我们提出了所有六个对象和他们的双峰宽巴耳末发射线，并讨论了影响的潮汐中断事件（TDE）的极端变化的解释，假设双峰源SMBH二进制。
Most massive galaxies contain a supermassive black hole (SMBH) at their centre. When galaxies merge, their SMBHs sink to the centre of the new galaxy, where they are thought to eventually merge. During this process, an SMBH binary is formed. The presence of two sets of broad emission lines in the optical spectrum of an active galactic nucleus (AGN) has been interpreted as evidence for two broad-line regions (BLRs), one surrounding each SMBH in a binary. We modelled the broad Balmer emission lines in the SDSS spectra of 373 extreme variability AGNs using one broad and several narrow Gaussian components. We report on the discovery of SDSS J021647.53 − 011341.5 (hereafter J0216) as a double-peaked broad emission line source. Among the 373 AGNs, there were five sources that are known as double-peaked emission line sources. Three of these have been reported as candidate SMBH binaries in previous studies. We present all six objects and their double-peaked broad Balmer emission lines, and discuss the implications for a tidal disruption event (TDE) interpretation of the extreme variability, assuming the double-peaked sources are SMBH binaries.