The physics and chemistry of the L134N molecular core
The physics and chemistry of the L134N molecular core
复制标题
L134N分子核心的物理和化学
DOI：
10.1086/167954
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
D. Swade
中科院分区：
文献类型：
--
作者：
D. Swade
通过毫米和厘米波长发射线光谱详细研究了暗云 L134N。 L134N中存在高密度分子气体核心，其动力学温度约为12 K，峰值分子氢密度约为10 exp 4.5/cu cm，质量约为23太阳。核心可能是未来恒星形成的场所。 (C-18)O、CS、H(C-13)O(+)、SO、NH3 和 C3H2 的发射图揭示了形态上不同的分布，部分原因是云内不同的物理条件和光学深度效应。还存在显着差异，这可能是由于化学丰度变化造成的。一组一致的 LTE 化学丰度已估计在多达 7 个位置，可用于约束乌云的化学模型。 73 参考文献
The dark cloud L134N is studied in detail via millimeter- and centimeter-wavelength emission-line spectra. A high-density core of molecular gas exists in L134N which has a kinetic temperature of about 12 K, a peak molecular hydrogen density of about 10 exp 4.5/cu cm, and a mass of about 23 solar. The core may be the site of future star formation. Maps of emission from (C-18)O, CS, H(C-13)O(+), SO, NH3, and C3H2 reveal morphologically different distributions resulting in part from both varying physical conditions within the cloud and optical depth effects. Significant differences also exist which are probably due to chemical abundance variations. A consistent set of LTE chemical abundances has been estimated at as many as seven positions, which can be used to constrain chemical models of dark clouds. 73 refs.