Far-Infrared Spectroscopic Survey of Near-by Interstellar Clouds

近邻星际云的远红外光谱巡天

• 批准号: 05452022
• 负责人: NAKAGAWA Takao
• 金额: $ 4.74万
• 依托单位: The Institute of Space & Astronautical Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452022/
• 关键词: Interstellar Gas; Far-Infrared Spectroscopy; [CII] Spectral Line; Star-Forming Regions; Photo-Dissociation Regions; Survey Observation

The far-infrared [C II] spectral line (^2P_<3/2>-^2P_<1/2>,157.7409 mum), which is emitted by singly ionized carbon (C^+), is the dominant coolant of neutral interstellar clouds. Hence observations of the line is crucial to reveal the physical states, especially the energy budget, of interstellar clouds.We have been successfully making survey observations of the [C II] line using a dedicated observing instrument BICE.The observational results are very important for interstellar physics. However, since there are various components in a line sight toward the Galactic plane, the observational results are rather complicated.Hence the [C II] observations of indivudual clouds which have a single component in a line sight are very important to understand the physical properties of the [C II] emitting regions. To make templates of [C II] emitting regions, we observed the Orion regions, which is the most representative massive-star-forming regions. The observation was carried out on September 3,1994, from the Sanriku Balloon Center, using the BICE.The observation revelaed that there are several groups of [C II] emitting regions with different physical parameters in the Orion regions. Using the results, we reinvestigated our previous [C II] observations of the Galactic plane.

远红外[C II]谱线（^2P_<3/2>-^2P_<1/2>，157.7409 μ m）由单离子化碳（C^+）发射，是中性星际云的主要冷却剂。因此，对[C II]线的观测对于揭示星际云的物理状态，特别是能量收支是至关重要的，我们利用专用的BICE观测仪器成功地对[C II]线进行了巡天观测，观测结果对星际物理具有重要意义。然而，由于在朝向银道面的一条直线上有各种各样的分量，观测结果相当复杂，因此，对在一条直线上有单一分量的单个云的[C II]观测对于了解[C II]发射区的物理性质是非常重要的。为了制作[C II]发射区的模板，我们观察了猎户座区域，这是最具代表性的猎户座恒星形成区域。1994年9月3日在日本三陆气球中心用BICE对猎户座进行了观测，发现猎户座区存在多组不同物理参数的[C Ⅱ]发射区。利用这些结果，我们重新研究了我们以前对银河系平面的观测。

项目成果

Okuda,et al.: "Large Scale [CII] Line Emission in the Galaxy Observed by Stratospheric Balloons" Infrared Physics. 35. 391-405 (1994)

Okuda 等人：“平流层气球观测到的星系中的大规模 [CII] 线发射”红外物理学。

H.Okuda et al.: "Large Scale〔CII〕Line Emission in the Galaxy Observed by Stratospheric Balloons" Infrared Physics Technology. 35. 391-405 (1994)

H. Okuda 等人：“平流层气球观测到的星系中的大规模 [CII] 线发射”红外物理技术 35. 391-405 (1994)。

Nakagawa,et al.: "Deficit of Far-Infrared [CII] Line Emission toward the Galactic Center" Astrophys. J.Letters. 455(印刷中). (1995)

Nakakawa 等人：“向银河系中心发射的远红外 [CII] 线的缺陷”，J.Letters 455（出版中）。

Yui, et al.: "A [CII] 158 micron Map of the rho-Ophiuchi Cloud" Astrophysical Journal Letters. 419. L37-L40 (1993)

Yui 等人：“一张 [CII] 158 微米 rho-Ophiuchi 云图”《天体物理学杂志快报》。

H.Murakami et al.: "The Infrared Telescope in Space(IRTS)" Astrophysical Journal. 428. 354-362 (1994)

H.Murakami 等人：“太空红外望远镜（IRTS）”天体物理学杂志。