论文标题
低音XXX：DR2 Eddington-Ratios，Black Hole块和X射线发光度的分布功能
BASS XXX: Distribution Functions of DR2 Eddington-ratios, Black Hole Masses, and X-ray Luminosities
论文作者
论文摘要
We determine the low-redshift X-ray luminosity function (XLF), active black hole mass function (BHMF), and Eddington-ratio distribution function (ERDF) for both unobscured (Type 1) and obscured (Type 2) active galactic nuclei (AGN) using the unprecedented spectroscopic completeness of the BAT AGN Spectroscopic Survey (BASS) data release 2. In addition to a straightforward 1/vmax方法，我们还计算了内在分布，通过采用正向建模方法来恢复观察到的BHMF和ERDF来考虑样本截断。由于以前的BHMF和ERDF仅针对明亮的，宽线（1型）AGN和/或Quasars的样品进行了可靠的确定，因此，我们是第一个直接观察到2型AGN的直接观察约束的BHMF和ERDF。我们发现，在考虑了所有观察性偏见之后，与1型AGN的固有性ERDF相比，2型AGN的固有ERDF明显偏向较低的Eddington比率。该结果支持辐射调节的统一场景，在这种情况下，辐射压力决定了AGN周围灰尘遮盖的结构的几何形状。在两个单独的质量箱中计算ERDF，我们验证了派生的形状是一致的，可以验证ERDF（形状）独立于质量的假设。我们通过将低音活性BHMF与所有SMBH的局部质量函数进行比较，报告了局部AGN占空比与质量和爱丁顿比率的函数。我们还介绍了Swift-Bat 70个月来源的日志N-LOG s。
We determine the low-redshift X-ray luminosity function (XLF), active black hole mass function (BHMF), and Eddington-ratio distribution function (ERDF) for both unobscured (Type 1) and obscured (Type 2) active galactic nuclei (AGN) using the unprecedented spectroscopic completeness of the BAT AGN Spectroscopic Survey (BASS) data release 2. In addition to a straightforward 1/Vmax approach, we also compute the intrinsic distributions, accounting for sample truncation by employing a forward modeling approach to recover the observed BHMF and ERDF. As previous BHMFs and ERDFs have been robustly determined only for samples of bright, broad-line (Type 1) AGNs and/or quasars, ours is the first directly observationally constrained BHMF and ERDF of Type 2 AGN. We find that after accounting for all observational biases, the intrinsic ERDF of Type 2 AGN is significantly skewed towards lower Eddington ratios than the intrinsic ERDF of Type 1 AGN. This result supports the radiation-regulated unification scenario, in which radiation pressure dictates the geometry of the dusty obscuring structure around an AGN. Calculating the ERDFs in two separate mass bins, we verify that the derived shape is consistent, validating the assumption that the ERDF (shape) is mass independent. We report the local AGN duty cycle as a function of mass and Eddington ratio, by comparing the BASS active BHMF with the local mass function for all SMBH. We also present the log N-log S of Swift-BAT 70-month sources.
