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

doi:10.1093/mnras/staa1785

CORC > 海洋研究所 > 中国科学院海洋研究所 > 深海极端环境与生命过程研究中心

	Extreme close encounters between proto-Mercury and proto-Venus in terrestrial planet formation
	Fang, Tong 2; Deng, Hongping 1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2020-08-01
卷号	496 期号:3 页码:3781-3785
关键词	planets and satellites: terrestrial planet-dynamical evolution and stability
ISSN号	0035-8711
DOI	10.1093/mnras/staa1785
通讯作者	Deng, Hongping(hd353@cam.ac.uk)
英文摘要	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.
资助项目	Swiss National Science Foundation
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000574919300075
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/168873]
专题	海洋研究所_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.Univ Cambridge, Dept Appl Math & Theoret Phys, Ctr Math Sci, Wilberforce Rd, Cambridge CB3 0WA, England 2.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China
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.