Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41467-019-11057-4 |
Orbital bistatic radar observations of asteroid Vesta by the Dawn mission | |
Palmer, Elizabeth M.1; Heggy, Essam2,3; Kofman, Wlodek4,5 | |
2019-07-16 | |
发表期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2017 |
卷号 | 8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France; Poland |
英文摘要 | We present orbital bistatic radar observations of a small-body, acquired during occultation by the Dawn spacecraft at asteroid Vesta. The radar forward-scattering properties of different reflection sites are used to assess the textural properties of Vesta's surface at centimeter-to-decimeter scales and are compared to subsurface hydrogen concentrations observed by Dawn's Gamma Ray and Neutron Detector to assess potential volatile occurrence in the surface and shallow subsurface. We observe significant differences in surface radar reflectivity, implying substantial spatial variations in centimeter-to-decimeter-scale surface roughness. Our results suggest that unlike the Moon, Vesta's surface roughness variations cannot be explained by cratering processes only. In particular, the occurrence of heightened hydrogen concentrations within large smoother terrains (over hundreds of square kilometers) suggests that potential ground-ice presence may have contributed to the formation of Vesta's current surface texture. Our observations are consistent with geomorphological evidence of transient water flow from Dawn Framing Camera images. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000410451600001 |
WOS关键词 | MARS GLOBAL SURVEYOR ; SURFACE ; PLANETARY ; POLE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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/204451 |
专题 | 资源环境科学 |
作者单位 | 1.Western Michigan Univ, Dept Geosci, 1903 W Michigan Ave, Kalamazoo, MI 49008 USA; 2.Univ Southern Calif, Ming Hsieh Dept Elect Engn, 3737 Watt Way, Los Angeles, CA 90089 USA; 3.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA; 4.UGA CNRS, Inst Planetol & Astrophys Grenoble IPAG UMR 5274, F-38041 Grenoble, France; 5.Polish Acad Sci, Space Res Ctr, Bartycka 18A, PL-00716 Warsaw, Poland |
推荐引用方式 GB/T 7714 | Palmer, Elizabeth M.,Heggy, Essam,Kofman, Wlodek. Orbital bistatic radar observations of asteroid Vesta by the Dawn mission[J]. NATURE COMMUNICATIONS,2019,8. |
APA | Palmer, Elizabeth M.,Heggy, Essam,&Kofman, Wlodek.(2019).Orbital bistatic radar observations of asteroid Vesta by the Dawn mission.NATURE COMMUNICATIONS,8. |
MLA | Palmer, Elizabeth M.,et al."Orbital bistatic radar observations of asteroid Vesta by the Dawn mission".NATURE COMMUNICATIONS 8(2019). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论