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Extreme close encounters between proto-Mercury and proto-Venus in terrestrial planet formation | |
Fang, Tong1; Deng, Hongping2 | |
2020-08-01 | |
发表期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
ISSN | 0035-8711 |
卷号 | 496期号:3页码:3781-3785 |
通讯作者 | Deng, Hongping(hd353@cam.ac.uk) |
摘要 | Modern models of terrestrial planet formation require solids depletion interior to 0.5-0.7 au in the planetesimal disc to explain the small mass of Mercury. The Earth and Venus analogues emerge after similar to 100 Myr collisional growth, while Mercury forms in the diffusive tails of the planetesimal disc. We carried out 250 N-body simulations of planetesimal discs with mass confined to 0.7-1.0 au to study the statistics of close encounters that were recently proposed as an explanation for the high ironmass fraction inMercury. We formed 39 Mercury analogues in total and all proto-Mercury analogues were scattered inwards by proto-Venus. Proto-Mercury typically experiences six extreme close encounters (closest approach smaller than six Venus radii) with Proto-Venus after Proto-Venus acquires 0.7 Venus Mass. At such close separation, the tidal interaction can already affect the orbital motion significantly such that the N-body treatment itself is invalid. More and closer encounters are expected should tidal dissipation of orbital angular momentum accounted. Hybrid N-body hydrodynamic simulations, treating orbital and encounter dynamics self-consistently, are desirable to evaluate the degree of tidal mantle stripping of proto-Mercury. |
关键词 | planets and satellites: terrestrial planet-dynamical evolution and stability |
DOI | 10.1093/mnras/staa1785 |
收录类别 | SCI |
语种 | 英语 |
资助项目 | Swiss National Science Foundation |
WOS研究方向 | Astronomy & Astrophysics |
WOS类目 | Astronomy & Astrophysics |
WOS记录号 | WOS:000574919300075 |
出版者 | OXFORD UNIV PRESS |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.qdio.ac.cn/handle/337002/168874 |
专题 | 深海极端环境与生命过程研究中心 |
通讯作者 | Deng, Hongping |
作者单位 | 1.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China 2.Univ Cambridge, Dept Appl Math & Theoret Phys, Ctr Math Sci, Wilberforce Rd, Cambridge CB3 0WA, England |
第一作者单位 | 中国科学院海洋研究所 |
推荐引用方式 GB/T 7714 | Fang, Tong,Deng, Hongping. Extreme close encounters between proto-Mercury and proto-Venus in terrestrial planet formation[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,496(3):3781-3785. |
APA | Fang, Tong,&Deng, Hongping.(2020).Extreme close encounters between proto-Mercury and proto-Venus in terrestrial planet formation.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,496(3),3781-3785. |
MLA | Fang, Tong,et al."Extreme close encounters between proto-Mercury and proto-Venus in terrestrial planet formation".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 496.3(2020):3781-3785. |
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文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
mnras%2Fstaa1785.pdf(413KB) | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 |
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