论文标题
改变外观AGN的明智观点：AGN过渡阶段的证据
WISE view of changing-look AGNs: evidence for a transitional stage of AGNs
论文作者
论文摘要
与光学宽发射线（光学clagns）的显着变化和/或强烈变化的变化外观活跃的银河系核（clagns）的发现和/或强烈变化的视线线密度（X射线clagns）挑战了基于方向的AGN统一模型。我们基于{\ it Wide-Field红外调查Explorer}（{\ it Wise}）存档数据，探索了57个光学扣和11个X射线策略的样品中的中红外（MID-IR）属性。我们发现，光学和X射线策略的Eddington量表中IR亮度都停留在低亮度AGN（LLAGNS）和发光QSO之间。光学和X射线策略的Eddington平均级中IR亮度分别为$ \ sim 0.4 $ \％和$ \ sim 0.5 $ \％，这大致对应了辐射效率高效的积分（RIAF）和Shakura-sunyaev disk（Sssd）之间过渡之间过渡的辐射亮度。我们估计了MID-IR背后的变化的时间滞后，该变化在光条中的13个具有很强的MID-IR变异性的锁骨，其中时间滞后与侧冲效光度（$τ-L $）之间的紧密相关性在亮度QSOS中大致遵循。
The discovery of changing-look active galactic nuclei (CLAGNs) with the significant change of optical broad emission lines (optical CLAGNs) and/or strong variation of line-of-sight column densities (X-ray CLAGNs) challenges the orientation-based AGN unification model. We explore mid-infrared (mid-IR) properties for a sample of 57 optical CLAGNs and 11 X-ray CLAGNs based on the {\it Wide-field Infrared Survey Explorer} ({\it WISE}) archive data. We find that Eddington-scaled mid-IR luminosities of both optical and X-ray CLAGNs stay just between low-luminosity AGNs (LLAGNs) and luminous QSOs. The average Eddington-scaled mid-IR luminosities for optical and X-ray CLAGNs are $\sim 0.4$\% and $\sim 0.5$\%, respectively, which roughly correspond the bolometric luminosity of transition between a radiatively inefficient accretion flow (RIAF) and Shakura-Sunyaev disk (SSD). We estimate the time lags of the variation in the mid-IR behind that in the optical band for 13 CLAGNs with strong mid-IR variability, where the tight correlation between the time lag and the bolometric luminosity ($τ- L$) for CLAGNs roughly follows that found in the luminous QSOs.
