Far-Infrared Spectroscopic Study of Interstellar Medium and Star-formation Rate in the Galactic Center

银河系中心星际介质和恒星形成速率的远红外光谱研究

基本信息

批准号：
09440093
负责人：
NAKAGAWA Takao
金额：
$ 6.46万
依托单位：
The Institute of Space and Astronautical Science
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

We made large-scale survey observations of the far-infrared [CII] spectral line from the Galactic plane, and found that the [CII] line is anomalously weak toward the Galactic center. We attribute this weakness to the soft interstellar radiation field in the Galactic center region. If it is the case, our observations suggest that the current star-formation rate in the Galactic center region is relatively low.In order to check the above suggestion, we planned high spatial observations of the [CII] line emission from the Galactic center using the TIFR (TATA Institute of Fundamental Research, India) 1m balloon-borne telescope, and made the first observation with this system successfully during the campaign in 1999. We could not observe the Galactic center in this campaign, but we are now planning to observe the region on the basis of the experience gained during this campaign.We also observed the Galactic center region with the space-borne telescope ISO (infrared Space Observatory). Although we could not observe the whole region, we could cover the whole far-infrared region spectroscopically, and this observation is complement with balloon-borne observations.We also made theoretical calculations of far-infrared emission from photo-dissociation regions to interpret the above observations.

我们从银河平面对远红外[CII]光谱线进行了大规模的调查观察，发现[CII]线对银河系中心异常弱。我们将这种弱点归因于银河中心区域的软星际辐射场。如果是这种情况，我们的观察结果表明，银河中心地区的当前恒星形态率相对较低。在此运动中观察银河系中心，但我们现在计划根据该活动期间获得的经验观察该地区。我们还与太空式望远镜ISO（红外太空观测站）一起观察了银河中心地区。尽管我们无法观察整个区域，但我们可以从光谱镜上覆盖整个远红外区域，并且这种观察与气球传播的观测值相辅相成。我们还理论上计算了来自光脱离区域的远红外发射以解释上述观察结果。

项目成果

期刊论文数量（20）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Takako Nakagawa,Kenji Mochizuki,Haruyuki Okuda, Yukari Y. Yui, Yasuo Doi, Hiroshi Shibai, Tetsuo Nishimura, and frank J. Low: "Far-Infrared[CII]Line Emission from the Galaxy and Large Magellanic Cloud"Star formation 1999. 24-27 (1999)

Takako Nakakawa、Kenji Mochizuki、Haruyuki Okuda、Yukari Y. Yui、Yasuo Doi、Hiroshi Shibai、Tetsuo Nishimura 和 Frank J. Low：“来自银河系和大麦哲伦星云的远红外 [CII] 线发射”恒星形成 1999。