Large-scale forbidden C II 158 micron emission from the Galaxy
Large-scale forbidden C II 158 micron emission from the Galaxy
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银河系大规模禁止 C II 158 微米发射
DOI：
10.1086/170141
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
F. Low
中科院分区：
文献类型：
--
作者：
H. Shibai;H. Okuda;T. Nakagawa;H. Matsuhara;T. Maihara;K. Mizutani;Yukiyasu Kobayashi;N. Hiromoto;T. Nishimura;F. Low
沿着银河平面的广阔区域（30°≤l≤51°）检测到漫射远红外[C II]发射线。 [C II] 线很亮，并且远离离散的 H II 区域。 [C II]强度分布的横向和纵向剖面与 12 CO (J = 1-0) 和 100 μm 连续谱非常相似，但与 HI 21 cm 完全不同。漫射[C II]发射可能来自包围暴露于一般星际紫外线辐射场的巨型分子云的光解C + 区域。扩展的低密度电离气体也可能有助于扩散[C II]发射。
A diffuse far-infrared [C II] emission line has been detected in an extensive region (30° ≤ l ≤ 51°) along the Galactic plane. The [C II] line is bright and extended far from discrete H II regions. Latitudinal and longitudinal profiles of the [C II] intensity distribution are quite similar to those of 12 CO (J = 1-0) and the 100 μm continuum, but are completely different from those of HI 21 cm. The diffuse [C II] emission probably comes from the photodissociated C + regions enveloping giant molecular clouds exposed to the general interstellar UV radiation field. The extended low-density ionized gas might also contribute to the diffuse [C II] emission.