An observational Study of galactic center galactic center regions with sub millimeter molecular and atomic lines

银河系中心的观测：我们绘制了分子云（0.02+0.02）的5角分区域，该区域显示了在银河系中心CI线（492 GHz）中发现的特殊速度结构。用Nobeyama 45米望远镜观测到的与分子云有关的CI发射出现在距离CO云30弧秒的地方。发现C/CO丰度比为0.45，约为巨型分子云典型值的3倍。在银河圆盘中。核区星系的观测：对活跃的星星形成星系NGC 253进行了CO（J=3-2）谱线的成图观测。强CO发射不仅出现在中心区域，而且出现在离核几千秒差距的盘中，在那里也发现了CI。

Observations of our galactic center:We have mapped an area of 5 arc-minutes of the molecule cloud (0.02+0.02) that displays peculiar velocity structure discovered in the galactic center in the CI line (492 GHz). The CI emission associated with the molecular cloud which was observed with the Nobeyama 45-m telescope, appeared 30 arc-seconds away from the CO cloud. The C/CO abundance ratio was found to be 0.45, which is about 3 times as large as a typical value for giant molecular clouds. in the galactic disk. These results suggest existence of a shocked region in which molecular gas has been dissociated by shock waves by several supernova explosions.Observation of nucleus regions galaxies:Mapping observations in the CO (J=3-2) line were made for NGC253, a galaxy of active star formation. The strong CO emission was found not only in the center region but also in the disk a few kpc from the nucleus where the CI was also discovered.