论文标题
中央分子区的三维结构
Three-Dimensional Structure of the Central Molecular Zone
论文作者
论文摘要
从档案中获得了银河中心（GC）区域的HI和CO线立方体数据的详细比较。中央分子区域（CMZ）显示在半径$ \ sim 320 $ PC和垂直尺度高度$ \ sim 70 $ PC中嵌入HI盘（Central Hi Zone，CHZ）中。显示一条无线电连续带与分子臂I和II平行运行。腰带在天空上绘制了双重形状，连接sgr e（$ l \ sim -1^\ circ.2）$，c，b1，b2和sgr d（$+1^\ circ.2 $），并将其解释为扭曲的星形形成星形戒指。分子臂与经度速度图（LVD）上的HI臂紧密相关，显示了连贯的刚体脊。由于HI和CO之间的密切关系，HI线的吸收可用于确定相对于SGR A，B1，B2和C.com的武器位置，以浏览SGR A $^*$的适当动作的三角学数据以及SGR B2的Maser源以及径向速度的Maser源，以及radial速度，以及SGR B2的3D Velocity Velocity Velocity Velocity Velocity Velocity vector velocity vector velocity velocity vector velocity velocity velocity velocity velocity velocity velocity velocity。从这些分析中，带有SGR B2的分子臂I位于SGR A $^*$的近侧，另一侧具有SGR C的ARM II，两者都在GC周围组成一对对称臂。我们提出了SGR A的3D视图以及E和ARM I和II以及参数列表。
A detailed comparison of HI and CO line cube data of the Galactic Center (GC) region from the archives is obtained. The central molecular zone (CMZ) is shown to be embedded in the HI disc (central HI zone, CHZ) of radius $\sim 320$ pc and vertical scale height $\sim 70$ pc. A radio continuum belt is shown to run parallel to molecular Arms I and II. The belt draws a double-infinity shape on the sky, connecting Sgr E ($l\sim -1^\circ.2)$, C, B1, B2 and Sgr D ($+1^\circ.2$), and is interpreted as a warping star-forming ring. The molecular Arms are closely associated with the HI arms on the longitude-velocity diagram (LVD), showing coherent rigid-body ridges. Due to the close relationship between HI and CO, the HI line absorption can be used to determine the Arms' position relative to Sgr A, B1, B2 and C.Combining the trigonometric data of proper motions of Sgr A$^*$ and maser sources of Sgr B2 as well as radial velocities, the 3D velocity vector of Sgr B2 is determined. From these analyses, the molecular Arm I with Sgr B2 is shown to be located in the near side of Sgr A$^*$, and Arm II with Sgr C in the other side, both composing a pair of symmetrical Arms around the GC. We present a possible 3D view of Sgr A through E and Arms I and II along with a parameter list.
