A survey of the 158 micron forbidden C II fine-structure line in the central 50 parsecs of the Galaxy
A survey of the 158 micron forbidden C II fine-structure line in the central 50 parsecs of the Galaxy
复制标题
对银河系中央 50 秒差距的 158 微米 C II 精细结构禁线的勘测
DOI：
10.1086/186065
复制
发表时间：
1991
期刊：
影响因子：
--
通讯作者：
G. Stacey
中科院分区：
文献类型：
--
作者：
A. Poglitsch;N. Geis;M. Haggerty;J. Jackson;G. Stacey
美国宇航局的柯伊伯空中天文台已经被用来在1角秒的分辨率下对银河系中央50个PC中158微米的被禁止的C II精细结构线发射进行广泛的、速度分辨的测量。研究发现，朝着围绕Sgr A West旋转的环核圆盘发射最强；辐射的连续桥梁将Sgr A复合体连接到中心以北10弧分的射电弧内的热射电灯丝。这表明了一种直接的物理联系。最明亮的辐射优先出现在巨大的银河系中心分子云的边缘附近。结果表明，这些云团主要由外部紫外光光子电离。参考文献29。
NASA's Kuiper Airborne Observatory has been used to conduct an extensive, velocity-resolved survey at 1-arcsec resolution of the 158-micron forbidden C II fine-structure line emission in the central 50 pc of the Galaxy. The emission is found to be strongest toward the rotating circumnuclear disk surrounding Sgr A West; a continuous bridge of the emission connects the Sgr A complex to the thermal radio filaments in the radio arc 10 arcmin north of the center. This suggests a direct physical connection. The brightest emission occurs preferentially near the edges of the massive Galactic center molecular clouds. It is concluded that these clouds are predominantly ionized by external UV photons. 29 refs.