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题名: A new and simple approach to determine the abundance of hydrogen molecules on interstellar ice mantles
作者: Hincelin, U.1; Chang, Q.2, 3; Herbst, E.1
刊名: ASTRONOMY & ASTROPHYSICS
出版日期: 2015-02-01
卷号: 574
关键词: astrochemistry ; molecular processes ; methods: numerical ; ISM: molecules ; ISM: abundances
DOI: 10.1051/0004-6361/201424807
文章类型: Article
英文摘要: Context. Water is usually the main component of ice mantles, which cover the cores of dust grains in cold portions of dense interstellar clouds. When molecular hydrogen is adsorbed onto an icy mantle through physisorption, a common assumption in gas-grain rate-quation models is to use an adsorption energy for molecular hydrogen on a pure water substrate. However, at high density and low temperature, when H-2 is efficiently adsorbed onto the mantle, its surface abundance can be strongly overestimated if this assumption is still used. Unfortunately, the more detailed microscopic Monte Carlo treatment cannot be used to study the abundance of H-2 in ice mantles if a full gas-grain network is utilized.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: GAS-GRAIN CHEMISTRY ; SURFACE-CHEMISTRY ; MONTE-CARLO ; DARK CLOUDS ; CHEMICAL-MODELS ; H-2 FORMATION ; ASTRONOMICAL DETECTION ; STICKING PROBABILITY ; ORGANIC-MOLECULES ; O-2 ABUNDANCE
收录类别: SCI
语种: 英语
WOS记录号: WOS:000349467000024
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15776
Appears in Collections:毫米波和亚毫米波技术实验室_期刊论文

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作者单位: 1.Univ Virginia, Dept Chem, Charlottesville, VA 22904 USA
2.Chinese Acad Sci, XinJiang Astron Observ, Urumqi 830011, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
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