Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1126/science.aay3544 |
Episodes of particle ejection from the surface of the active asteroid (101955) Bennu | |
Lauretta, D. S.1; 39;Aubigny, C. Y. Drouet2 | |
2019-12-06 | |
发表期刊 | SCIENCE |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2019 |
卷号 | 366期号:6470页码:1217-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada; Spain; France; England; Czech Republic |
英文摘要 | Active asteroids are those that show evidence of ongoing mass loss. We report repeated instances of particle ejection from the surface of (101955) Bennu, demonstrating that it is an active asteroid. The ejection events were imaged by the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer) spacecraft. For the three largest observed events, we estimated the ejected particle velocities and sizes, event times, source regions, and energies. We also determined the trajectories and photometric properties of several gravitationally bound particles that orbited temporarily in the Bennu environment. We consider multiple hypotheses for the mechanisms that lead to particle ejection for the largest events, including rotational disruption, electrostatic lofting, ice sublimation, phyllosilicate dehydration, meteoroid impacts, thermal stress fracturing, and secondary impacts. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000502662500051 |
WOS关键词 | IMPACT ; YARKOVSKY ; DYNAMICS ; REGOLITH ; ORIGIN ; ORBIT ; ICE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
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/226375 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA; 2.CALTECH, Jet Prop Lab, Pasadena, CA USA; 3.KinetX Aerosp, Simi Valley, CA USA; 4.Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC, Canada; 5.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 6.Southwest Res Inst, Boulder, CO USA; 7.Univ Cent Florida, Dept Phys, Orlando, FL USA; 8.Rowan Univ, Dept Geol, Glassboro, NJ USA; 9.York Univ, Ctr Res Earth & Space Sci, Toronto, ON, Canada; 10.Univ Colorado, Smead Dept Aerosp Engn Sci, Boulder, CO 80309 USA; 11.Univ La Laguna, Inst Astrofis Canarias, Tenerife, Spain; 12.Univ La Laguna, Dept Astrofis, Tenerife, Spain; 13.Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA; 14.Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN USA; 15.No Arizona Univ, Dept Astron & Planetary Sci, Flagstaff, AZ 86011 USA; 16.Univ Maryland, Dept Aerosp Engn, College Pk, MD 20742 USA; 17.Natl Museum Nat Hist, Smithsonian Inst, Washington, DC 20560 USA; 18.SETI Search Extraterr Intelligence Inst, Mountain View, CA USA; 19.Planetary Sci Inst, Tucson, AZ USA; 20.Univ Cote Azur, Observ Cote Azur, CNRS, Lab Lagrange, Nice, France; 21.London Stereoscop Co, London, England; 22.Open Univ, Sch Phys Sci, Milton Keynes, Bucks, England; 23.Charles Univ Prague, Inst Astron, Prague, Czech Republic |
推荐引用方式 GB/T 7714 | Lauretta, D. S.,39;Aubigny, C. Y. Drouet. Episodes of particle ejection from the surface of the active asteroid (101955) Bennu[J]. SCIENCE,2019,366(6470):1217-+. |
APA | Lauretta, D. S.,&39;Aubigny, C. Y. Drouet.(2019).Episodes of particle ejection from the surface of the active asteroid (101955) Bennu.SCIENCE,366(6470),1217-+. |
MLA | Lauretta, D. S.,et al."Episodes of particle ejection from the surface of the active asteroid (101955) Bennu".SCIENCE 366.6470(2019):1217-+. |
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