The chemistry of multiply deuterated species in cold, dense interstellar cores
The chemistry of multiply deuterated species in cold, dense interstellar cores
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DOI：
10.1051/0004-6361:20040441
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发表时间：
2004-09-01
影响因子：
6.5
通讯作者：
Millar, TJ
中科院分区：
文献类型：
--
作者：
Roberts, H;Herbst, E;Millar, TJ
我们提出了星际氘化学的新模型，其中包含比之前考虑的更多的氘物种。我们首先描述已经进行的更新，并比较两个不同的底层网络在恒星核心的低温和高密度特征下给出的结果。然后，我们使用这些模型来解释最近对星前核心中 CO 消耗和 D2CO/H2CO 比率的观察结果。我们发现我们的模型和恒定密度场景的观测结果之间的一致性有限，但对于其中两个核心，当我们考虑到核心的密度结构时，我们表现出合理的一致性。
We present new models of interstellar deuterium chemistry that include more multiply deuterated species than previously considered. We first describe the updates that have been made, and compare the results given by two different underlying networks at the low temperatures and high densities characteristic of prestellar cores. We then use the models to explain recent observations of CO depletion and D2CO/H2CO ratios in prestellar cores. We find limited agreement between our models and observations for constant density scenarios, but for two of these cores we demonstrate reasonable agreement when we take the density structure of the core into account.