Far Ultraviolet Spectroscopic Explorer Observations of the HD Molecule toward HD 73882

Far Ultraviolet Spectroscopic Explorer Observations of the HD Molecule toward HD 73882
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HD 分子对 HD 73882 的远紫外光谱探测器观察

DOI:
10.1086/312799
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发表时间:
2000
期刊:
The Astrophysical Journal Letters
影响因子:
--
通讯作者:
H. Moos
H. Moos
中科院分区:
--
文献类型:
--
作者:
R. Ferlet;M. André;G. Hébrard;A. D. Étangs;M. Lemoine;G. Forêts;E. Roueff;B. Rachford;J. Shull;T. Snow;J. Tumlinson;A. Vidal;D. York;H. Moos

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氘化分子氢 (HD) 的莱曼和维尔纳能带系统出现在低于 1120 Å 的远紫外范围内。 FUSE 任务的高灵敏度可以在中等分辨率下观察到穿过半透明云的炽热恒星,以期观察分子核心,其中氘基本上以 HD 形式存在。因此,HD/H2比率的测量可能成为评估星际介质中氘丰度D/H的强大新工具。我们报告了对高消光恒星 HD 73882 (EB-V = 0.72) 的 HD 探测。提出了初步分析。
The Lyman and Werner band systems of deuterated molecular hydrogen (HD) occur in the far-UV range below 1120 Å. The high sensitivity of the FUSE mission can give access, at moderate resolution, to hot stars shining through translucent clouds in the hope of observing molecular cores in which deuterium is essentially in the form of HD. Thus, the measurement of the HD/H2 ratio may become a powerful new tool to evaluate the deuterium abundance, D/H, in the interstellar medium. We report on the detection of HD toward the high-extinction star HD 73882 (EB-V = 0.72). A preliminary analysis is presented.