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DOI | 10.1038/s41561-019-0330-x |
Shape of (101955) Bennu indicative of a rubble pile with internal stiffness | |
Barnouin, O. S.1; 39;Aubigny, C. Y. Drouet2 | |
2019-04-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:4页码:247-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada; France; Japan; Czech Republic; England; Australia; Italy; Spain |
英文摘要 | The shapes of asteroids reflect interplay between their interior properties and the processes responsible for their formation and evolution as they journey through the Solar System. Prior to the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer) mission, Earth-based radar imaging gave an overview of (101955) Bennu's shape. Here we construct a high-resolution shape model from OSIRIS-REx images. We find that Bennu's top-like shape, considerable macroporosity and prominent surface boulders suggest that it is a rubble pile. High-standing, north-south ridges that extend from pole to pole, many long grooves and surface mass wasting indicate some low levels of internal friction and/or cohesion. Our shape model indicates that, similar to other top-shaped asteroids, Bennu formed by reaccumulation and underwent past periods of fast spin, which led to its current shape. Today, Bennu might follow a different evolutionary pathway, with an interior stiffness that permits surface cracking and mass wasting. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000462621700008 |
WOS关键词 | SMALL-SCALE TOPOGRAPHY ; LIGHTCURVE ; REGOLITH ; ITOKAWA ; DENSITY ; PHYSICS ; ORIGIN ; BODIES |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/182194 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA; 2.York Univ, Ctr Res Earth & Space Sci, Toronto, ON, Canada; 3.Planetary Sci Inst, Tucson, AZ USA; 4.Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC, Canada; 5.Lockheed Martin Space, Littleton, CO USA; 6.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 7.Univ Arizona, Lunar & Planetary Lab, Tucson, AZ USA; 8.KinetX Aerosp Inc, Simi Valley, CA USA; 9.Smithsonian Inst Natl Museum Nat Hist, Washington, DC USA; 10.Southwest Res Inst, Boulder, CO USA |
推荐引用方式 GB/T 7714 | Barnouin, O. S.,39;Aubigny, C. Y. Drouet. Shape of (101955) Bennu indicative of a rubble pile with internal stiffness[J]. NATURE GEOSCIENCE,2019,12(4):247-+. |
APA | Barnouin, O. S.,&39;Aubigny, C. Y. Drouet.(2019).Shape of (101955) Bennu indicative of a rubble pile with internal stiffness.NATURE GEOSCIENCE,12(4),247-+. |
MLA | Barnouin, O. S.,et al."Shape of (101955) Bennu indicative of a rubble pile with internal stiffness".NATURE GEOSCIENCE 12.4(2019):247-+. |
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