Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL079819 |
Mysterious Linear Features Across Saturn's Moon Dione | |
Martin, Emily S.1; Patthoff, D. Alex2 | |
2018-10-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
![]() |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:20页码:10978-10986 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Our mapping of the wispy terrains on Saturn's moons Dione has revealed unique linear features that are generally long (tens to hundreds of kilometers), narrow (<5 km), and brighter than the surrounding terrains. We refer to these features as linear virgae. Similar features, with a limited distribution, have been observed on Rhea. Wherever linear virgae are observed, they appear to crosscut all other structures suggesting that they are among the youngest features on these satellites. Here we seek to constrain whether the linear virgae are endogenic, suggesting that the surface of Dione has been geologically active recently or if they are exogenic, suggesting a recent, or even ongoing, process in the Saturn system. We favor an exogenic mechanism for the formation of linear virgae on Dione by the emplacement of material across the surface by low-velocity impacts of material sourced from Saturn's rings, co-orbital moons, or encountering planetocentric debris. Plain Language Summary After the arrival of the Cassini spacecraft to the Saturnian system, unusual linear features were observed across Dione. We also noticed similar features on Saturn's moon Rhea. We name these features linear virgae (virgae meaning a stripe or streak of color) and report on their distribution and characteristics as they are observed on the surfaces of Dione and Rhea. Our understanding of the distribution of linear virgae across Rhea is incomplete, likely because of data coverage; however, on Dione, we find that linear virgae are parallel to the equator and are confined to the region between 45 degrees N and 45 degrees S. We explored different ways of forming linear features on planetary surfaces and favor the draping of exogenic material across a planetary surface by encounters with either Saturn's rings, co-orbital moons, or close flyby of comets. This debris may introduce materials into the Dione system that could contribute to creating a more habitable Dione. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000451510500021 |
WOS关键词 | CRATER CHAINS ; SURFACE ; VOYAGER-2 ; CALLISTO ; HISTORY ; ORIGIN ; ATLAS ; ICE |
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/27347 |
专题 | 气候变化 |
作者单位 | 1.Smithsonian Inst, Natl Air & Space Museum, Ctr Earth & Planetary Studies, Washington, DC 20560 USA; 2.Planetary Sci Inst, Tucson, AZ USA |
推荐引用方式 GB/T 7714 | Martin, Emily S.,Patthoff, D. Alex. Mysterious Linear Features Across Saturn's Moon Dione[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(20):10978-10986. |
APA | Martin, Emily S.,&Patthoff, D. Alex.(2018).Mysterious Linear Features Across Saturn's Moon Dione.GEOPHYSICAL RESEARCH LETTERS,45(20),10978-10986. |
MLA | Martin, Emily S.,et al."Mysterious Linear Features Across Saturn's Moon Dione".GEOPHYSICAL RESEARCH LETTERS 45.20(2018):10978-10986. |
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