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题名: Boulders on asteroid Toutatis as observed by Chang'e-2
作者: Jiang Yun(蒋云)1; Ji JiangHui(季江徽)1; Huang, Jiangchuan2; Marchi, Simone3; Li, Yuan4; Ip, Wing-Huen4, 5
刊名: SCIENTIFIC REPORTS
出版日期: 2015-11-02
卷号: 5
DOI: 10.1038/srep16029
文章类型: Article
英文摘要: Boulders are ubiquitously found on the surfaces of small rocky bodies in the inner solar system and their spatial and size distributions give insight into the geological evolution and collisional history of the parent bodies. Using images acquired by the Chang'e-2 spacecraft, more than 200 boulders have been identified over the imaged area of the near-Earth asteroid Toutatis. The cumulative boulder size frequency distribution (SFD) shows a steep slope of -4.4 +/- 0.1, which is indicative of a high degree of fragmentation. Similar to Itokawa, Toutatis probably has a rubble-pile structure, as most boulders on its surface cannot solely be explained by impact cratering. The significantly steeper slope for Toutatis' boulder SFD compared to Itokawa may imply a different preservation state or diverse formation scenarios. In addition, the cumulative crater SFD has been used to estimate a surface crater retention age of approximately 1.6 +/- 0.3 Gyr.
WOS标题词: Science & Technology
类目[WOS]: Multidisciplinary Sciences
研究领域[WOS]: Science & Technology - Other Topics
关键词[WOS]: EJECTA BLOCKS ; SPIN-STATE ; HAYABUSA ; ITOKAWA ; IMAGES ; CRATER ; IMPACT ; SIZE ; 25143-ITOKAWA ; REGOLITH
收录类别: SCI
项目资助者: National Natural Science Foundation of China(41403056 ; Strategic Priority Research Program-The Emergence of Cosmological Structures of the Chinese Academy of Sciences(XDB09000000) ; innovative and interdisciplinary program by CAS(KJZD-EW-Z001) ; Natural Science Foundation of Jiangsu Province(BK20131040 ; Foundation of Minor Planets of Purple Mountain Observatory ; 11273068 ; BK20141509) ; 11473073)
语种: 英语
WOS记录号: WOS:000363878100001
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16042
Appears in Collections:行星科学与深空探测实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Key Lab Planetary Sci, Nanjing 210008, Peoples R China
2.China Acad Space Technol, Beijing 100094, Peoples R China
3.Southwest Res Inst, Boulder, CO 80302 USA
4.Macau Univ Sci & Technol, Space Sci Inst, Taipa, Macau, Peoples R China
5.Natl Cent Univ, Inst Astron, Taoyuan, Taiwan
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