Self-consistent grain depletions and abundances I: the Orion Nebula as a test case
Self-consistent grain depletions and abundances I: the Orion Nebula as a test case
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自洽的颗粒损耗和丰度 I：猎户座星云作为测试案例
DOI：
10.1093/mnras/stac022
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发表时间：
2022
影响因子：
4.8
通讯作者：
Ferland, Gary
中科院分区：
文献类型：
--
作者：
Gunasekera, Chamani M.;Ji, Xihan;Chatzikos, Marios;Yan, Renbin;Ferland, Gary
星际介质中的原子物种主要通过消耗到尘埃中而脱离其气相。在这项研究中，我们检查了当尘埃枯竭程度根据最新发表的模型改变时，猎户座高层区域的光电离模型的谱线比预测是否有任何变化。我们使用了前人发表的公式和参数，以简化云中贫化丰度的计算。我们的目标是让云用户能够使用输入文件中的单个参数来改变消耗水平。这使得更有效地探索对大范围消耗的预测成为可能。最后，我们讨论了猎户座星云模型在以这种方式操纵耗竭程度时所得到的结果。我们发现，尘埃颗粒上的耗尽对谱线比的强度有显著影响。此外，我们发现，随着尘埃的减少，调整尘埃的丰度会影响整个高层H+层的结构和整体温度。
Atomic species in the interstellar medium transition out of their gas phase mainly by depletion on to dust. In this study, we examine if there is any change to the spectral-line ratio predictions from a photoionization model of the Orion Hiiregion when the degree of dust depletions is altered according to the most recently published model. We use equations and parameters published by previous works, in order to streamline the calculation of depleted abundances withincloudy. Our aim is forcloudyusers to be able to vary the level of depletion using a single parameter in the input file. This makes it possible to explore predictions for a large range of depletions more efficiently. Finally, we discuss the results obtained for a model of the Orion Nebula when the degree of depletions are manipulated in this way. We found that the intensity of line ratios are significantly affected by depletions on to dust grains. Further, we found that adjusting dust abundances along with depletion affects the structure and the overall temperature of the H+layer across the Hiiregion.