首页> 外文期刊>The Astrophysical journal >ENHANCED DEUTERIUM FRACTIONATION IN DENSE INTERSTELLAR CORES RESULTING FROM MULTIPLY DEUTERATED H_3~+
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ENHANCED DEUTERIUM FRACTIONATION IN DENSE INTERSTELLAR CORES RESULTING FROM MULTIPLY DEUTERATED H_3~+

机译:多次氘化H_3〜+导致的密集星际孔中氘的增强分馏

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摘要

In this Letter, we present the first results from updated models of interstellar deuterium chemistry that now include all possible deuterated isotopomers of H_3~+. We find that in regions of high density and heavy depletion, such as prestellar cores, the inclusion of HD_2~+ and D_3~+ enhances the fractionation of ionic and neutral species significantly. Our models are the first to predict the very high atomic D/H ratios (≥0.3) necessary for grain-surface chemistry models to reproduce the high formaldehyde and methanol fractionation seen in star-forming regions.
机译:在这封信中,我们介绍了星际氘化学更新模型的最初结果,该模型现在包括所有可能的H_3〜+氘代同位素。我们发现,在高密度和高耗竭区域,例如星前核,HD_2〜+和D_3〜+的加入显着增强了离子和中性物质的分离。我们的模型是第一个预测非常高的原子D / H比(≥0.3)的模型,该模型是晶粒表面化学模型重现恒星形成区域中高甲醛和甲醇分馏所必需的。

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