气候变化领域集成服务门户(CCPortal): In situ collection of dust grains falling from Saturn's rings into its atmosphere

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DOI	10.1126/science.aat3185
	In situ collection of dust grains falling from Saturn's rings into its atmosphere
	Hsu H.-W.; Schmidt J.; Kempf S.; Postberg F.; Moragas-Klostermeyer G.; Seiß M.; Hoffmann H.; Burton M.; Ye S.; Kurth W.S.; Horányi M.; Khawaja N.; Spahn F.; Schirdewahn D.; O'Donoghue J.; Moore L.; Cuzzi J.; Jones G.H.; Srama R.
发表日期	2018
ISSN	0036-8075
卷号	362 期号:6410
英文摘要	Saturn's main rings are composed of >95% water ice, and the nature of the remaining few percent has remained unclear. The Cassini spacecraft's traversals between Saturn and its innermost D ring allowed its cosmic dust analyzer (CDA) to collect material released from the main rings and to characterize the ring material infall into Saturn.We report the direct in situ detection of material from Saturn's dense rings by the CDA impact mass spectrometer. Most detected grains are a few tens of nanometers in size and dynamically associated with the previously inferred "ring rain." Silicate and water-ice grains were identified, in proportions that vary with latitude. Silicate grains constitute up to 30% of infalling grains, a higher percentage than the bulk silicate content of the rings. © 2017 The Authors, some rights reserved.
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/244080
作者单位	Laboratory for Atmospheric and Space Physics, University of Colorado-Boulder, Boulder, CO, United States; Astronomy Research Unit, University of Oulu, Oulu, Finland; Institut für Geowissenschaften, Universität Heidelberg, Heidelberg, Germany; Institut für Geologische Wissenschaften, Freie Universität Berlin, Berlin, Germany; Institut für Raumfahrtsysteme, Universität Stuttgart, Stuttgart, Germany; Institut für Physik und Astronomie, Universität Potsdam, Potsdam, Germany; Jet Propulsion Laboratory, Pasadena, CA, United States; Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Center for Space Physics, Boston University, Boston, MA, United States; NASA Ames Research Center, Moffett Field, CA, United States; Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, United Kingdom; Centre for Planetary Sciences, University College London/Birkbeck, London, United Kingdom; Center f...
推荐引用方式 GB/T 7714	Hsu H.-W.,Schmidt J.,Kempf S.,et al. In situ collection of dust grains falling from Saturn's rings into its atmosphere[J],2018,362(6410).
APA	Hsu H.-W..,Schmidt J..,Kempf S..,Postberg F..,Moragas-Klostermeyer G..,...&Srama R..(2018).In situ collection of dust grains falling from Saturn's rings into its atmosphere.Science,362(6410).
MLA	Hsu H.-W.,et al."In situ collection of dust grains falling from Saturn's rings into its atmosphere".Science 362.6410(2018).