论文标题
Seyfert 1星系中环境周环培养基的密度曲线
Density profile of ambient circumnuclear medium in Seyfert 1 galaxies
论文作者
论文摘要
环境周环介质（ACM）密度曲线的形状可以探测到星系中心和核周环境中中央超级黑洞的历史。但是，由于仪器分辨率的限制，大多数星系中ACM的密度曲线在很大程度上仍然未知。在这项工作中，我们提出了一种新的方法，可以通过温暖吸收剂的辐射压力之间的平衡来测量活性银河核（AGN）的ACM密度谱（AGN）（是ACM的一种AGN流出）和阻力压力。我们研究了五个seyfert 1星系中的每个星系中的流出速度和电离参数之间的相关性（NGC 3227，NGC 3783，NGC 4051，NGC 4593和NGC 4593和NGC 5548），从而确定了ACM的n \ r^-1.7（n \ r^-1.7（r.1.7）之间的相关性。在这五个AGN中，密度和R为距离）从0.01 PC到PC量表。我们的结果表明，Seyfert 1星系中的ACM密度曲线比球形对称的Bondi积聚模型和热吸积流的模拟结果更陡峭，但更符合标准薄磁盘模型的预测。
The shape of the ambient circumnuclear medium (ACM) density profile can probe the history of accretion onto the central supermassive black hole in galaxies and the circumnuclear environment. However, due to the limitation of the instrument resolution, the density profiles of the ACM for most of galaxies remain largely unknown. In this work, we propose a novel method to measure the ACM density profile of active galactic nucleus (AGN) by the equilibrium between the radiation pressure on the warm absorbers (WAs, a type of AGN outflows) and the drag pressure from the ACM. We study the correlation between the outflow velocity and ionization parameter of WAs in each of the five Seyfert 1 galaxies (NGC 3227, NGC 3783, NGC 4051, NGC 4593, and NGC 5548), inferring that the density profile of the ACM is between n\propto r^-1.7 and n \propto r^-2.15 (n is number density and r is distance) from 0.01 pc to pc scales in these five AGNs. Our results indicate that the ACM density profile in Seyfert 1 galaxies is steeper than the prediction by the spherically symmetric Bondi accretion model and the simulated results of the hot accretion flow, but more in line with the prediction by the standard thin disk model.
