DOI: 10.1038/ngeo2916
论文题名: An ongoing satellite-ring cycle of Mars and the origins of Phobos and Deimos
作者: Hesselbrock A.J. ; Minton D.A.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期: 4 起始页码: 266
结束页码: 269
语种: 英语
Scopus关键词: accretion
; impact structure
; Mars
; mathematical analysis
; Moon
英文摘要: The Martian moons Phobos and Deimos may have accreted from a ring of impact debris, but explaining their origin from a single giant impact has proven difficult. One clue may lie in the orbit of Phobos that is slowly decaying as the satellite undergoes tidal interactions with Mars. In about 70 million years, Phobos is predicted to reach the location of tidal breakup and break apart to form a new ring around the planet. Here we use numerical simulations to suggest that the resulting ring will viscously spread to eventually deposit about 80% of debris onto Mars; the remaining 20% of debris will accrete into a new generation of satellites. Furthermore, we propose that this process has occurred repeatedly throughout Martian history. In our simulations, beginning with a large satellite formed after a giant impact with early Mars, we find that between three and seven ring-satellite cycles over the past 4.3 billion years can explain Phobos and Deimos as they are observed today. Such a scenario implies the deposition of significant ring material onto Mars during each cycle. We hypothesize that some anomalous sedimentary deposits observed on Mars may be linked to these periodic episodes of ring deposition. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105812
Appears in Collections: 气候减缓与适应 科学计划与规划
There are no files associated with this item.
作者单位: Department of Physics and Astronomy, Purdue University, 525 Northwestern Avenue, West Lafayette, IN, United States; Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN, United States
Recommended Citation:
Hesselbrock A.J.,Minton D.A.. An ongoing satellite-ring cycle of Mars and the origins of Phobos and Deimos[J]. Nature Geoscience,2017-01-01,10(4)