Extreme close encounters between proto-Mercury and proto-Venus in terrestrial planet formation

doi:10.1093/mnras/staa1785

	Extreme close encounters between proto-Mercury and proto-Venus in terrestrial planet formation
	Fang, Tong 1; Deng, Hongping 2
	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	被引频次：6[WOS] [WOS记录] [WOS相关记录]
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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