气候变化领域集成服务门户(CCPortal): Widespread carbon-bearing materials on near-earth asteroid (101955) bennu

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DOI	10.1126/science.abc3522
	Widespread carbon-bearing materials on near-earth asteroid (101955) bennu
	Simon A.A.; Kaplan H.H.; Hamilton V.E.; Lauretta D.S.; Campins H.; Emery J.P.; Barucci M.A.; Dellagiustina D.N.; Reuter D.C.; Sandford S.A.; Golish D.R.; Lim L.F.; Ryan A.; Rozitis B.; Bennett C.A.
发表日期	2020
ISSN	0036-8075
卷号	370 期号:6517
英文摘要	Asteroid (101955) Bennu is a dark asteroid on an Earth-crossing orbit that is thought to have assembled from the fragments of an ancient collision. We use spatially resolved visible and near-infrared spectra of Bennu to investigate its surface properties and composition. In addition to a hydrated phyllosilicate band, we detect a ubiquitous 3.4-micrometer absorption feature, which we attribute to a mix of organic and carbonate materials. The shape and depth of this absorption feature vary across Bennu's surface, spanning the range seen among similar main-belt asteroids. The distribution of the absorption feature does not correlate with temperature, reflectance, spectral slope, or hydrated minerals, although some of those characteristics correlate with each other. The deepest 3.4-micrometer absorptions occur on individual boulders. The variations may be due to differences in abundance, recent exposure, or space weathering. © 2020 American Association for the Advancement of Science. All rights reserved.
英文关键词	carbon; phyllosilicate derivative; silicate; unclassified drug; asteroid; carbon; carbonate; gas hydrate; organic compound; phyllosilicate; spectral analysis; spectral reflectance; absorption; Article; asteroid; astronomy; chemical composition; environmental temperature; infrared spectroscopy; measurement repeatability; optical spectroscopy; priority journal; solar radiation; space flight; surface property; Asteroidea
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/245500
作者单位	Solar System Exploration Division, Nasa Goddard Space Flight Center, Greenbelt, MD, United States; Southwest Research Institute, Boulder, CO, United States; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, United States; Department of Physics, University of Central Florida, Orlando, FL, United States; Department of Astronomy and Planetary Sciences, Northern Arizona University, Flagstaff, AZ, United States; Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique, Centre National de la Recherche Scientifique, Université Paris Sciences et Lettres, Observatoire de Paris, Meudon, France; Nasa Ames Research Center, Moffett Field, CA, United States; School of Physical Sciences, Open University, Milton Keynes, United Kingdom
推荐引用方式 GB/T 7714	Simon A.A.,Kaplan H.H.,Hamilton V.E.,et al. Widespread carbon-bearing materials on near-earth asteroid (101955) bennu[J],2020,370(6517).
APA	Simon A.A..,Kaplan H.H..,Hamilton V.E..,Lauretta D.S..,Campins H..,...&Bennett C.A..(2020).Widespread carbon-bearing materials on near-earth asteroid (101955) bennu.Science,370(6517).
MLA	Simon A.A.,et al."Widespread carbon-bearing materials on near-earth asteroid (101955) bennu".Science 370.6517(2020).