A new and simple approach to determine the abundance of hydrogen molecules on interstellar ice mantles

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	A new and simple approach to determine the abundance of hydrogen molecules on interstellar ice mantles
	Hincelin, U.1; Chang, Q.2,3; Herbst, E.1
刊名	ASTRONOMY & ASTROPHYSICS
	2015-02-01
卷号	574
关键词	astrochemistry molecular processes methods: numerical ISM: molecules ISM: abundances
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
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/15776]
专题	紫金山天文台_毫米波和亚毫米波技术实验室
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
推荐引用方式 GB/T 7714	Hincelin, U.,Chang, Q.,Herbst, E.. A new and simple approach to determine the abundance of hydrogen molecules on interstellar ice mantles[J]. ASTRONOMY & ASTROPHYSICS,2015,574.
APA	Hincelin, U.,Chang, Q.,&Herbst, E..(2015).A new and simple approach to determine the abundance of hydrogen molecules on interstellar ice mantles.ASTRONOMY & ASTROPHYSICS,574.
MLA	Hincelin, U.,et al."A new and simple approach to determine the abundance of hydrogen molecules on interstellar ice mantles".ASTRONOMY & ASTROPHYSICS 574(2015).