论文标题
AGN中的超快流入真的很少见吗？还是很难看到？
Are ultrafast inflows in AGN truly rare -- or just much harder to see?
论文作者
论文摘要
在原型UFO PG 1211+143强大的高度电离风中，短期可变性和多个速度成分表示内盘不稳定性或短暂的积聚事件。位于20 r_g的高速速度（〜0.3C）的检测是对后一种情况的首个直接观察支持，在这种情况下，在高度倾斜到黑洞旋转平面时，物质可能会导致内部积分盘的扭曲和撕裂，并产生随后的碰撞冲击，并产生损失的损失，并损失了损失，并快速地进行了损失的损失。同时柔软的X射线光谱显示出较低的离子物质的速度（〜0.1c）流入，被确定为200 r_g时的“上游”，通过在超级质量黑洞上收敛的视线。我们在这里讨论为什么超快速离子风在发光的塞弗特星系中相对常见，而在pg 1211+143中检测0.3c流入仍然是一个罕见的例子。
Short-term variability and multiple velocity components in the powerful highly ionized wind of the archetypal UFO PG 1211+143 are indicative of inner disc instabilities or short-lived accretion events. The detection of a high velocity (~ 0.3c) inflow of highly ionized matter, located at 20 R_g, offered the first direct observational support for the latter scenario, where matter approaching at a high inclination to the black hole spin plane may result in warping and tearing of the inner accretion disc, with subsequent inter-ring collisions producing shocks, loss of rotational support and rapid mass infall. Simultaneous soft x-ray spectra reveal a lower velocity (~ 0.1c) inflow of less ionized matter, identified as 'upstream' at 200 R_g, with a line of sight through matter converging on the supermassive black hole. We discuss here why ultrafast ionized winds are relatively common in luminous Seyfert galaxies, while detection of the 0.3c inflow in PG 1211+143 remains a rare example.
