THE CHEMISTRY OF PHOSPHORUS IN HOT MOLECULAR CORES
THE CHEMISTRY OF PHOSPHORUS IN HOT MOLECULAR CORES
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热分子核中磷的化学性质
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
T. Millar
中科院分区：
文献类型：
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作者：
S. Charnley;T. Millar
已知恒星形成区域的热分子核心具有气相化学成分，其成分由星际颗粒的冰冷地幔蒸发的物质决定，随后在气相中发生反应。目前的模型表明，蒸发的材料富含氢化物质。在本文中，我们考虑的化学诱导的热核释放的磷化氢，PH 3，从星际颗粒。结果表明，PH3与氢原子发生一系列反应后迅速被破坏，并在104年内转化为P、PO和PN，其中P原子是最丰富的物种。其他含磷分子可以在高温气体中形成，但与热核相比，其时间尺度更长。
Hot molecular cores in star-forming regions are known to have gas-phase chemical compositions determined by the material evaporated from the icy mantles of interstellar grains, followed by subsequent reactions in the gas phase. Current models suggest that the evaporated material is rich in hydrogenated species. In this paper we consider the chemistry induced in a hot core by the release of phosphine, PH 3 , from interstellar grains. We nd that PH 3 is rapidly destroyed by a series of reactions with atomic hydrogen and is converted, within 10 4 yrs, into atomic P, and PO and PN, with P atoms being the most abundant species. Other phosphorus-bearing molecules can be formed in the hot gas but on timescales long compared to those of the hot cores.