Study of Global Star formation in Our Galaxy by servey observation of Emission lines of Anmonia molecules

通过氨分子发射线的观测研究银河系中全球恒星的形成

• 批准号: 14340058
• 负责人: HABE Asao
• 金额: $ 9.86万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14340058/
• 关键词: molecular cloud; star formation; our Galaxy; interstellar molecule; Radio astronomy; astrophysics; Anmonia molecule; 22GHz; オリオン分子雲; 我々の銀河; デジタル分光器

In order to upgrade Hokkaido University 11m radio telescope, we have made the new radio receiver of 22Ghz, the hone for 22GHz receiver, the degital spctrum analyzers, and the control system of Hokkaido university 11m radio telescope. Purpose of our study is to investigate of property of global star formation in our galaxy, by observation of Anmonia molecules whic is in dense cores in molecular clouds in our galaxy. In this study, we will observe four, different spectral lines from highly exitation of rotational states of Anmonia molecules to know rotational excitation temperature, since study of density and temperature is very important to study star formation in molecular clouds.We have made the test observation of Anmonia molecules in the Cygnus region which is in the spiral arm in our Galaxy. We have succeeded to detect (J,K)=(1,1),(2,2) and (3,3)lines. By using the intensity of these lines, we deduce temperature of molecules which is 20K and is consistent with previous observation.We will make survey observation of Anmolia molecules in dense molecular clouds in our galaxy to study global star formation.

为了对北海道大学11米射电望远镜进行升级改造，我们研制了22 GHz的新型射电接收机、22 GHz接收机的天线、数字频谱分析仪和北海道大学11米射电望远镜的控制系统。我们的研究目的是通过对银河系分子云致密核中的Anmonia分子的观测，探讨银河系中全球性星星形成的性质。由于密度和温度的研究对研究分子云中星星的形成是非常重要的，我们将从Anmonia分子的转动态的高激发谱线中观测到四条不同的谱线，以了解转动激发温度，我们已经在银河系旋臂的天鹅座区域对Anmonia分子进行了实验观测。我们成功地检测到（J，K）=（1，1），（2，2）和（3，3）线。利用这些谱线的强度，我们推断出分子的温度为20 K，这与以前的观测结果是一致的，我们将对银河系致密分子云中的Anmolia分子进行巡天观测，以研究全球星星的形成。

项目成果

Dense Molecular Gas in Lenticular Galaxies

• DOI: 10.1093/pasj/54.4.555
• 发表时间: 2002-06
• 期刊: Publications of the Astronomical Society of Japan
• 影响因子: 2.3
• 作者: N. Kuno;N. Nakai;K. Sorai;K. Nishiyama;B. Vila-Vlaro

Is HE 0107–5240 A Primordial Star? The Characteristics of Extremely Metal-Poor Carbon-Rich Stars

• DOI: 10.1086/422135
• 发表时间: 2004-02
• 期刊: The Astrophysical Journal
• 作者: T. Suda;M. Aikawa;M. Machida;M. Fujimoto;Icko Iben, Jr.,

Kazuo Sorai: "Radial Distributions of the HCN/CO Ratio in Nearby CO Bright Galaxies"Publications of Astronomical Society of Japan. 54. 179-186 (2002)

Kazuo Sorai：“邻近 CO 明亮星系中 HCN/CO 比率的径向分布”日本天文学会出版物。

Emergence of a Narrow H2O Maser Feature in NGC 1052

NGC 1052 中窄 H2O 脉泽特征的出现

• 发表时间: 2005
• 期刊: The Astrophysical Journal 620
• 作者: Negami;Seiya;S.Kameno
• 通讯作者: S.Kameno

An Insight into the Reaction Rates of the Ne-Na and Mg-Al Chains from the Abundance Anomalies in Globular Cluster Red Giants

从球状星团红巨星的丰度异常洞察Ne-Na和Mg-Al链的反应速率

• 发表时间: 2004
• 期刊: The Astrophysical Journal 608
• 作者: M.Aikawa