Hybrid methods in planetesimal dynamics: formation of protoplanetary systems and the mill condition

	Hybrid methods in planetesimal dynamics: formation of protoplanetary systems and the mill condition
	Amaro-Seoane, Pau 1; Glaschke, Patrick 2; Spurzem, Rainer2,3,4
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2014-12-21
卷号	445 期号:4 页码:3755-3769
关键词	methods: numerical methods: statistical planets and satellites: dynamical evolution and stability protoplanetary discs
英文摘要	The formation and evolution of protoplanetary discs remains a challenge from both a theoretical and numerical standpoint. In this work, we first perform a series of tests of our new hybrid algorithm presented in Glaschke, Amaro-Seoane and Spurzem (henceforth Paper 1) that combines the advantages of high accuracy of direct-summation N-body methods with a statistical description for the planetesimal disc based on Fokker Planck techniques. We then address the formation of planets, with a focus on the formation of protoplanets out of planetesimals. We find that the evolution of the system is driven by encounters as well as direct collisions and requires a careful modelling of the evolution of the velocity dispersion and the size distribution over a large range of sizes. The simulations show no termination of the protoplanetary accretion due to gap formation, since the distribution of the planetesimals is only subjected to small fluctuations. We also show that these features are weakly correlated with the positions of the protoplanets. The exploration of different impact strengths indicates that fragmentation mainly controls the overall mass-loss, which is less pronounced during the early runaway growth. We prove that the fragmentation in combination with the effective removal of collisional fragments by gas drag sets an universal upper limit of the protoplanetary mass as a function of the distance to the host star, which we refer to as the mill condition.
收录类别	SCI
语种	英语
WOS记录号	WOS:000346963300034
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6456]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-14476 Potsdam, Germany 2.Heidelberg Univ, Zentrum Astron, Astron Rechen Inst, D-69120 Heidelberg, Germany 3.Chinese Acad Sci, Natl Astron Observ China, Beijing 100012, Peoples R China 4.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Amaro-Seoane, Pau,Glaschke, Patrick,Spurzem, Rainer. Hybrid methods in planetesimal dynamics: formation of protoplanetary systems and the mill condition[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,445(4):3755-3769.
APA	Amaro-Seoane, Pau,Glaschke, Patrick,&Spurzem, Rainer.(2014).Hybrid methods in planetesimal dynamics: formation of protoplanetary systems and the mill condition.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,445(4),3755-3769.
MLA	Amaro-Seoane, Pau,et al."Hybrid methods in planetesimal dynamics: formation of protoplanetary systems and the mill condition".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 445.4(2014):3755-3769.