半人马座A的翘曲圆盘，半径为2到6500 pc
The Warped Disk of Centaurus A from a radius of 2 to 6500 pc
摘要：
我们编译的位置和倾斜角倾斜环适合于弯曲的尘埃和气体盘跨度半径1.8至6500 pc从最近的观测。对于半径外部的一个千秒差距，倾斜环的方向在于一个弧上的极倾角与位置角图，这表明进动合并后可以考虑环的形态。在极坐标图上可以看到环的三个方向上的扭结，我们怀疑半径约为1.3kpc的一个对应于圆盘中的自引力影响环进动速率的位置。另一个在大约600 pc的半径处可以与气体分布中的间隙相关联。在100 pc的半径处观察到第三个扭结。一个恒定倾角的倾斜圆盘绕着射流轴线进动，可以描述圆盘在100和20 pc之间，但不在此范围内。一个模型与磁盘取向匹配的分子环核磁盘在100 pc，在较小的半径衰减到一个内部的平面磁盘垂直于射流可以占磁盘取向在100 pc。这两种模型都不能解释100或600 pc时的尖点或圆盘方向的变化。
英文摘要：
We compile position and inclination angles for tilted ring fits to the warped dusty and gaseous disk spanning radius 1.8 to 6500 pc from recent observations. For radii exterior to a kpc, tilted ring orientations lie on an arc on a polar inclination versus position angle plot, suggesting that precession following a merger can account for the ring morphology. Three kinks in the ring orientations are seen on the polar plot, the one at radius of about 1.3 kpc we suspect corresponds to the location where self-gravity in the disk affects the ring precession rate. Another at a radius of about 600 pc may be associated with a gap in the gas distribution. A third kink is seen at a radius of 100 pc. A constant inclination tilted disk precessing about the jet axis may describe the disk between 100 and 20 pc but not interior to this. A model with disk orientation matching the molecular circumnuclear disk at 100 pc that decays at smaller radii to an inner flat disk perpendicular to the jet may account for disk orientations within 100 pc. Neither model would account for the cusps or changes in disk orientation at 100 or 600 pc.
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