气候变化领域集成服务门户(CCPortal): Detection of abundant ethane and methane, along with carbon monoxide and water, in comet C/1996 B2 hyakutake: Evidence for interstellar origin

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DOI	10.1126/science.272.5266.1310
	Detection of abundant ethane and methane, along with carbon monoxide and water, in comet C/1996 B2 hyakutake: Evidence for interstellar origin
	Mumma M.J.; DiSanti M.A.; Dello Russo N.; Fomenkova M.; Magee-Sauer K.; Kaminski C.D.; Xie D.X.
发表日期	1996
ISSN	0036-8075
起始页码	1310
结束页码	1314
卷号	272 期号:5266
英文摘要	The saturated hydrocarbons ethane (C2H6) and methane (CH4) along with carbon monoxide (CO) and water (H2O) were detected in comet C/1996 B2 Hyakutake with the use of high-resolution infrared spectroscopy at the NASA Infrared Telescope Facility on Mauna Kea, Hawaii. The inferred production rates of molecular gases from the icy, cometary nucleus (in molecules per second) are 6.4 × 1026 for C2H6, 1.2 × 1027 for CH4, 9.8 × 1027 for CO, and 1.7 × 1029 for H2O. An abundance of C2H6 comparable to that of CH4 implies that ices in C/1996 B2 Hyakutake did not originate in a thermochemically equilibrated region of the solar nebula. The abundances are consistent with a kinetically controlled production process, but production of C2H6 by gas-phase ion molecule reactions in the natal cloud core is energetically forbidden. The high C2H6/CH4 ratio is consistent with production of C2H6 in icy grain mantles in the natal cloud, either by photolysis of CH4-rich ice or by hydrogen-addition reactions to acetylene condensed from the gas phase.
英文关键词	carbon monoxide; comet C/1996 B2 Hyakutake; ethane; infrared spectroscopy; methane; water; carbon monoxide; ethane; ice; methane; water; article; astronomy; microclimate; Non-programmatic; spectroscopy; Non-programmatic; Carbon Monoxide; Ethane; Extraterrestrial Environment; Ice; Meteoroids; Methane; Spectrum Analysis; Water
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244842
作者单位	NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; NASA Goddard Space Flight Center, Department of Physics, Catholic University of America, Washington, DC 20064, United States; Ctr. for Astrophys. and Space Sci., University of California, San Diego, CA 92093-0111, United States; Department of Chemistry and Physics, Rowan College of New Jersey, Glassboro, NJ 08028, United States; NASA Infrared Telescope Facility, Hilo, HI 96720, United States
推荐引用方式 GB/T 7714	Mumma M.J.,DiSanti M.A.,Dello Russo N.,et al. Detection of abundant ethane and methane, along with carbon monoxide and water, in comet C/1996 B2 hyakutake: Evidence for interstellar origin[J],1996,272(5266).
APA	Mumma M.J..,DiSanti M.A..,Dello Russo N..,Fomenkova M..,Magee-Sauer K..,...&Xie D.X..(1996).Detection of abundant ethane and methane, along with carbon monoxide and water, in comet C/1996 B2 hyakutake: Evidence for interstellar origin.Science,272(5266).
MLA	Mumma M.J.,et al."Detection of abundant ethane and methane, along with carbon monoxide and water, in comet C/1996 B2 hyakutake: Evidence for interstellar origin".Science 272.5266(1996).