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FAR ULTRAVIOLET SPECTROSCOPIC EXPLORER OBSERVATIONS OF THE HD MOLECULE TOWARD HD 73882

机译:HD分子朝HD 73882的远紫外光谱探索者观察

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摘要

The Lyman and Werner band systems of deuterated molecular hydrogen (HD) occur in the far-UV range below 1120 A. 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/H_2 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 (E_(B-V) = 0.72). A preliminary analysis is presented.
机译:氘化氢分子(HD)的Lyman和Werner能带系统发生在低于1120 A的远紫外线范围内。FUSE任务的高灵敏度可以使中等分辨率的热星通过半透明的云层发光,从而有望获得观察氘基本上为HD形式的分子核。因此,HD / H_2比的测量可能成为评估星际介质中氘丰度D / H的有力新工具。我们报告了对高消灭恒星HD 73882(E_(B-V)= 0.72)的HD检测。进行了初步分析。

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