论文标题
圆环和极性灰尘依赖于AGN特性
Torus and polar dust dependence on AGN properties
论文作者
论文摘要
我们介绍了围绕活性银河核（AGN）遮盖材料的性质的统计分析。这项研究代表了使用高角度分辨率红外数据和各种圆环模型的超高X射线（14-195kev; Swift/BAT）的超X射线（14-195Kev; Swift/BAT）的体积限制（DL <40 MPC）样品（BCS40样品）（BCS40样本）样本（BCS40样本）。我们发现，光滑，块和两相的圆环模型（即不包括极性尘埃风组分）和碟片+风模型分别为可比数量的星系，分别为8/24（33.3％）和9/24（37.5％）提供了最佳拟合。我们发现，最合适的模型取决于氢柱密度（NH），该密度与X射线（无镜/遮盖）和/或光学（SY1/SY2）分类有关。特别是，光滑，块和两相的圆环模型最能以相对较高的氢柱密度（log（NH）= 23.5+-0.8; I.E. SY2）的氢柱密度相对较高（log的中位数（NH）= 23.5+-0.8; I.E. SY2）最能重现AGN的红外发射（IR）。但是，块状盘+风模型为SY1/1.8/1.9（log（NH）= 21.0+-1.0的中位数）的核红外光谱分布（SED）提供了最佳拟合，特别是在近IIR（NIR）范围内。圆盘+风模型在拟合SY1星系的NIR发射方面的成功归功于将大石墨晶粒添加到灰尘组成和中间倾斜时风引起的自我掩量效应的结合。通常，我们发现具有不利（有利的）条件的Seyfert星系，即核氢柱密度和Eddington比率，用于发射IR Dusty极性流出，最适合光滑，块状和两相（磁盘+风）模型，从而确认模拟的预测。因此，我们的结果表明，AGN中内尘的结构的性质取决于内在的AGN特性。
We present a statistical analysis of the properties of the obscuring material around active galactic nuclei (AGN). This study represents the first of its kind for an ultra-hard X-ray (14-195keV; Swift/BAT) volume-limited (DL<40 Mpc) sample of 24 Seyfert (Sy) galaxies (BCS40 sample) using high angular resolution infrared data and various torus models: smooth, clumpy and two-phase torus models and clumpy disc+wind models. We find that the smooth, clumpy and two-phase torus models (i.e. without including the polar dusty wind component) and disc+wind models provide best fits for a comparable number of galaxies, 8/24 (33.3%) and 9/24 (37.5%), respectively. We find that the best-fitted models depend on the hydrogen column density (NH), which is related to the X-ray (unobscured/obscured) and/or optical (Sy1/Sy2) classification. In particular, smooth, clumpy and two-phase torus models best reproduce the infrared (IR) emission of AGN with relatively high hydrogen column density (median value of log (NH)=23.5+-0.8; i.e. Sy2). However, clumpy disc+wind models provide the best fits to the nuclear IR spectral energy distributions (SEDs) of Sy1/1.8/1.9 (median value of log (NH)=21.0+-1.0), specifically in the near-IR (NIR) range. The success of the disc+wind models in fitting the NIR emission of Sy1 galaxies is due to the combination of adding large graphite grains to the dust composition and self-obscuration effects caused by the wind at intermediate inclinations. In general, we find that the Seyfert galaxies having unfavourable (favourable) conditions, i.e. nuclear hydrogen column density and Eddington ratio, for launching IR dusty polar outflows are best-fitted with smooth, clumpy and two-phase torus (disk+wind) models confirming the predictions from simulations. Therefore, our results indicate that the nature of the inner dusty structure in AGN depend on the intrinsic AGN properties.
