气候变化领域集成服务门户(CCPortal): The dust grains from 9P/Tempel 1 before and after the encounter with Deep Impact

CCPortal

DOI	10.1126/science.1119143
	The dust grains from 9P/Tempel 1 before and after the encounter with Deep Impact
	Harker D.E.; Woodward C.E.; Wooden D.H.
发表日期	2005
ISSN	0036-8075
起始页码	278
结束页码	280
卷号	310 期号:5746
英文摘要	Gemini-N observed the properties of dust ejected from the nucleus of comet 9P/ Tempel 1 before and after its encounter with Deep Impact. Marked changes were seen in the 7.8- to 13-micrometer spectral energy distribution and derived grain properties of the inner coma. A strong, broad silicate feature dominated by emission from amorphous pyroxene, amorphous olivine, and magnesium-rich crystalline olivine had developed by 1 hour after impact. The ejected dust mass is ≅104 to 106 kilograms on the basis of our models. Twenty-six hours later the silicate feature had faded, leaving a smooth featureless spectrum, similar to that observed before the impact, suggesting that the impact did not produce a new active region releasing small particles on the nucleus.
英文关键词	Amorphous materials; Astrophysics; Crystalline materials; Magnesium printing plates; Olivine; Planets; Silicates; Spectrum analyzers; Deep impact; Gemini-N; Spectral energy distribution; Dust; carbon; olivine; pyroxene; silicate; unclassified drug; comet; article; astronomy; comet; comet 9P/Tempel 1; deep impact program; dust; energy transfer; mass; mathematical analysis; particle radiation; priority journal; space flight; spectroscopy; Cosmic Dust; Meteoroids; Organic Chemicals; Silicates; Spectrophotometry, Infrared
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/243946
作者单位	Center for Astrophysics and Space Sciences, University of California, San Diego, Department 0424, 9500 Gilman Drive, San Diego, CA 92093-0424, United States; Department of Astronomy, University of Minnesota, 116 Church Street, SE, Minneapolis, MN 55455, United States; NASA, Ames Research Center, MS 245-3, Moffett Field, CA 94035-1000, United States
推荐引用方式 GB/T 7714	Harker D.E.,Woodward C.E.,Wooden D.H.. The dust grains from 9P/Tempel 1 before and after the encounter with Deep Impact[J],2005,310(5746).
APA	Harker D.E.,Woodward C.E.,&Wooden D.H..(2005).The dust grains from 9P/Tempel 1 before and after the encounter with Deep Impact.Science,310(5746).
MLA	Harker D.E.,et al."The dust grains from 9P/Tempel 1 before and after the encounter with Deep Impact".Science 310.5746(2005).