论文标题
红外辐射压力在塑造AGN中尘土飞扬的作用
The role of infrared radiation pressure in shaping dusty winds in AGN
论文作者
论文摘要
在parsec尺度上占主导地位的AGN红外发射的尘土飞行的检测揭示了基于尘土飞扬气体的环形分布的传统辐射转移模型的局限性。新的，更复杂，动态的结构正在出现，这种尘土飞扬的风的物理起源必须进行严格评估。我们提出了一个半分析模型，以测试AGN和加热灰尘本身发射的辐射加速尘埃风的假设。该模型由AGN和红外辐射灰尘磁盘组成，后者是流出的主要质量储备。我们计算在这种环境下尘土飞扬的气体块的轨迹，涉及重力和AGN辐射以及热尘土气体云本身的重新辐射。我们发现，形态由磁盘组成，这些磁盘的磁盘具有以下速度速度的轨道和在尘土盘的内边缘发射的倍增速度和双曲线极风。这与某些局部Seyfert AGN的高角度分辨率红外和亚MM观察结果一致。风的强度及其方向取决于爱丁顿的比率和灰尘团块的色谱柱密度，这与建议的辐射调节的遮盖模型一致，该模型为X射线遮盖了AGN周围的遮盖物质。
The detection of dusty winds dominating the infrared emission of AGN on parsec scales has revealed the limitations of traditional radiative transfer models based on a toroidal distribution of dusty gas. A new, more complex, dynamical structure is emerging and the physical origin of such dusty winds has to be critically assessed. We present a semi-analytical model to test the hypothesis of radiatively accelerated dusty winds launched by the AGN and by the heated dust itself. The model consists of an AGN and an infrared radiating dusty disk, the latter being the primary mass reservoir for the outflow. We calculate the trajectories of dusty gas clumps in this environment, accounting for both gravity and the AGN radiation as well as the re-radiation by the hot dusty gas clouds themselves. We find that the morphology consists of a disk of material that orbits with sub-Keplerian velocities and a hyperboloid polar wind launched at the inner edge of the dusty disk. This is consistent with high-angular resolution infrared and sub-mm observations of some local Seyfert AGN. The strength of the wind and its orientation depend on the Eddington ratio and the column density of the dusty clumps, which is in agreement with proposed radiation regulated obscuration models developed for the X-ray obscuring material around AGN.
