Hybrid methods in planetesimal dynamics: description of a new composite algorithm
文献类型：期刊论文
| 作者 | Glaschke, P.1; Amaro-Seoane, P.2; Spurzem, R.1,3,4
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2014-12-21 |
| 卷号 | 445期号:4页码:3620-3649 |
| 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 systems, the breeding grounds of planet formation, is a complex dynamical problem that involves many orders of magnitudes. To serve this purpose, we present a new hybrid algorithm that combines a Fokker Planck approach with the advantages of a pure direct-summation N-body scheme, with a very accurate integration of close encounters for the orbital evolution of the larger bodies with a statistical model, envisaged to simulate the very large number of smaller planetesimals in the disc. Direct-summation techniques have been historically developed for the study of dense stellar systems such as open and globular clusters and, within some limits imposed by the number of stars, of galactic nuclei. The number of modifications to adapt direct-summation N-body techniques to planetary dynamics is not undemanding and requires modifications. These include the way close encounters are treated, as well as the selection process for the 'neighbour radius' of the particles and the extended Hermite scheme, used for the very first time in this work, as well as the implementation of a central potential, drag forces and the adjustment of the regularization treatment. For the statistical description of the planetesimal disc, we employ a Fokker Planck approach. We include dynamical friction, high- and low-speed encounters, the role of distant encounters as well as gas and collisional damping and then generalize the model to inhomogenous discs. We then describe the combination of the two techniques to address the whole problem of planetesimal dynamics in a realistic way via a transition mass to integrate the evolution of the particles according to their masses. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000346963300023 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6549]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Heidelberg Univ, Zentrum Astron, Astron Rechen Inst, D-69120 Heidelberg, Germany 2.Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-14476 Golm, 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 | Glaschke, P.,Amaro-Seoane, P.,Spurzem, R.. Hybrid methods in planetesimal dynamics: description of a new composite algorithm[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,445(4):3620-3649. |
| APA | Glaschke, P.,Amaro-Seoane, P.,&Spurzem, R..(2014).Hybrid methods in planetesimal dynamics: description of a new composite algorithm.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,445(4),3620-3649. |
| MLA | Glaschke, P.,et al."Hybrid methods in planetesimal dynamics: description of a new composite algorithm".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 445.4(2014):3620-3649. |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。