论文标题
基于Zwicky瞬态设施光曲线的AGN连续回响映射
AGN Continuum Reverberation Mapping Based on Zwicky Transient Facility Light Curves
论文作者
论文摘要
我们使用$ \ sim $ \ sim $ 3天Cadence $ gri $ - band Light曲线对活动的银河核（AGN）连续滞后进行系统调查。我们在$ z <0.8 $下选择一个94型1型AGN的样品，具有基于插值互相关方法和贝叶斯方法标枪的明显且一致的带间滞后。在灯柱重新处理模型的框架内，我们的发现是：1）从数据中推断出的连续发射（CE）尺寸大于标准薄磁盘模型预测的磁盘尺寸； 2）对于样品的一部分，CE大小超过了几何薄磁盘的自我重度半径（12 lt-Day）的理论极限； 3）CE大小的尺寸尺度为$ r _ {\ Mathrm {ce}} \ propto l^{0.48 \ pm0.04} $，分散为0.2 dex，类似于众所周知的宽度H $ \mathrmβ$。这些发现表明，从宽线区域（BLR）到AGN连续滞后的弥漫性连续体发射的显着贡献。我们发现$ r _ {\ mathrm {ce}} - l $关系可以通过光电离世模型来解释，该模型假设$ \ sim $ \ sim $ 23％来自弥漫性BLR发射。另外，CE大小和模型预测的磁盘尺寸抗相关物与连续亮度的比率，表明潜在的非磁盘BLR滞后滞后贡献随着光度的发展而演变。最后，检测到CE大小和黑洞质量之间的牢固正相关。
We perform a systematic survey of active galactic nucleus (AGN) continuum lags using $\sim$3 day cadence $gri$-band light curves from the Zwicky Transient Facility. We select a sample of 94 type 1 AGN at $z<0.8$ with significant and consistent inter-band lags based on the interpolated cross-correlation function method and the Bayesian method JAVELIN. Within the framework of the lamp-post reprocessing model, our findings are: 1) The continuum emission (CE) sizes inferred from the data are larger than the disk sizes predicted by the standard thin disk model; 2) For a subset of the sample, the CE size exceeds the theoretical limit of the self-gravity radius (12 lt-days) for geometrically thin disks; 3) The CE size scales with continuum luminosity as $R_{\mathrm{CE}} \propto L^{0.48\pm0.04}$ with a scatter of 0.2 dex, analogous to the well-known radius-luminosity relation of broad H$\mathrmβ$. These findings suggest a significant contribution of diffuse continuum emission from the broad-line region (BLR) to AGN continuum lags. We find that the $R_{\mathrm{CE}}-L$ relation can be explained by a photoionization model that assumes $\sim$23% of the total flux comes from the diffuse BLR emission. In addition, the ratio of the CE size and model-predicted disk size anti-correlates with the continuum luminosity, indicative of a potential non-disk BLR lag contribution evolving with luminosity. Finally, a robust positive correlation between CE size and black hole mass is detected.
