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

亚毫米分子和原子线银河系中心区域的观测研究

• 批准号: 12304010
• 负责人: UKITA Nobuharu
• 金额: $ 29.8万
• 依托单位: National Astronomical Observatory of Japan
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12304010/
• 关键词: Interstellar cloud; radio astronomy; galactic center region; star formation; molecular line; sub millimeter; SIS receiver; remote control

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.

对银河系中心的观测：我们已经绘制了分子云(0.02+0.02)的5角分区域，显示了在CI线(492 GHz)的银河系中心发现的特殊速度结构。用Nobeama 45-m望远镜观测到的与分子云有关的CI辐射出现在距离CO云30角秒的地方。C/CO丰度比为0.45，约为巨型分子云标准值的3倍。在银河盘里。这些结果表明，在几次超新星爆炸中，分子气体被激波分解的激波区域存在。核区星系的观测：对活跃恒星形成的星系NGC253进行了CO(J=3-2)线的标绘观测。不仅在中心区域发现了强CO发射，而且在距离CI也被发现的核的几个kpc的圆盘中也发现了强的CO发射。

项目成果

Kamegai, K. et al.: "Distribution of the [C I] Emission in the ρ Ophiuchi Dark Cloud"Astrophysical Journal. 589-1. 378-385 (2003)

Kamegai, K. 等人：“蛇夫座暗云中的 [C I] 发射分布”《天体物理学杂志》589-1 (2003)。

Kohno, K. et al.: "Enhanced HCN (1-0) Emission in the Type-1 Seyfert Galaxy NGC 1097"Publ.Astron.Soc.Japan. 249. L55 (2002)

Kohno, K. 等人：“1 型 Seyfert 星系 NGC 1097 中增强的 HCN (1-0) 发射”Publ.Astron.Soc.Japan。

Ezawa, et al.: "ASCA Observations of the Temperature Structure and Metal Distribution in the Perseus Cluster of Galaxies"Publ.Astron.Soc.Japan. 53. 595-604 (2001)

Ezawa 等人：“ASCA 对英仙座星系团温度结构和金属分布的观测”Publ.Astron.Soc.Japan。

Yamamoto, S. et al.: "Observation of the C I ^3P_2-^3P_1 Line toward the Orion Kleinmann-Low Region"Astrophys.J.Letters. 547. L165-L169 (2001)

Yamamoto, S. 等人：“对猎户座 Kleinmann-Low 区域的 C I ^3P_2-^3P_1 线的观测”Astrophys.J.Letters。

Ukita,N. et al.: "NRO 10-m submillimeter telescope "Proc.SPIE. 4015. 177-184 (2000)

宇喜田，N.